away from, or not in, the normal or usual place, position, state, etc.: out of alphabetical order; to go out to dinner.
away from one's home, country, work, etc., as specified: to go out of town.
in or into the outdoors: to go out for a walk.
to a state of exhaustion, extinction, or depletion: to pump a well out.
to the end or conclusion; to a final decision or resolution: to say it all out.
to a point or state of extinction, nonexistence, etc.: to blow out the candle; a practice on the way out.
in or into a state of neglect, disuse, etc.; not in current vogue or fashion: That style has gone out.
so as not to be in the normal or proper position or state; out of joint: His back went out after his fall.
in or into public notice or knowledge: The truth is out at last.
seeking openly and energetically to do or have: to be out for a good time.
not in present possession or use, as on loan: The librarian said that the book was still out.
on strike: The miners go out at midnight.
so as to project or extend: to stretch out; stick your tongue out.
in or into activity, existence, or outward manifestation: A rash came out on her arm.
from a specified source or material: made out of scraps.
from a state of composure, satisfaction, or harmony: to be put out over trifles.
in or into a state of confusion, vexation, dispute, variance, or unfriendliness: to fall out about trifles.
so as to deprive or be deprived: to be cheated out of one's money.
so as to use the last part of: to run out of gas.
from a number, stock, or store: to point out the errors.
aloud or loudly: to cry out.
with completeness or effectiveness: to fill out.
thoroughly; completely; entirely: The children tired me out.
so as to obliterate or make undecipherable: to cross out a misspelling; to ink out.
not at one's home or place of employment; absent: I stopped by to visit you last night, but you were out.
not open to consideration; out of the question: I wanted to go by plane, but all the flights are booked, so that's out.
wanting; lacking; without: We had some but now we're out.
removed from or not in effective operation, play, a turn at bat, or the like, as in a game: He's out for the season because of an injury.
no longer having or holding a job, public office, etc.; unemployed; disengaged (usually followed by of ): to be out of work.
inoperative; extinguished: The elevator is out. Are the lights out?
finished; ended: before the week is out.
not currently stylish, fashionable, or in vogue: Fitted waistlines are out this season.
unconscious; senseless: Two drinks and he's usually out.
not in power, authority, or the like: a member of the out party.
(of a batter) not succeeding in getting on base: He was out at first on an attempted bunt.
(of a base runner) not successful in an attempt to advance a base or bases: He was out in attempting to steal second base.
beyond fixed or regular limits; out of bounds: The ball was out.
having a pecuniary loss or expense to an indicated extent: The company will be out millions of dollars if the new factory doesn't open on schedule.
incorrect or inaccurate: His calculations are out.
not in practice; unskillful from lack of practice: Your bow hand is out.
beyond the usual range, size, weight, etc. (often used in combination): an outsize bed.
exposed; made bare, as by holes in one's clothing: out at the knees.
at variance; at odds; unfriendly: They are out with each other.
moving or directed outward; outgoing: the out train.
not available, plentiful, etc.: Mums are out till next fall.
external; exterior; outer.
located at a distance; outlying: We sailed to six of the out islands.
Cricket. not having its innings: the out side.
of or pertaining to the playing of the first nine holes of an 18-hole golf course (opposed to in ): His out score on the second round was 33.
(used to indicate movement or direction from the inside to the outside of something): He looked out the window. She ran out the door.
(used to indicate location): The car is parked out back.
(used to indicate movement away from a central point): Let's drive out the old parkway.
begone! away!
(used in radio communications to signify that the sender has finished the message and is not expecting or prepared to receive a reply.) Compare over ( def 52 ).
Archaic. (an exclamation of abhorrence, indignation, reproach, or grief (usually followed by upon ): Out upon you!
a means of escape or excuse, as from a place, punishment, retribution, responsibility, etc.: He always left himself an out.
a person who lacks status, power, or authority, especially in relation to a particular group or situation.
Usually, outs. persons not in office or political power (distinguished from ins ).
Baseball. a put-out.
(in tennis, squash, handball, etc.) a return or service that does not land within the in-bounds limits of a court or section of a court (opposed to in ).
something that is out, as a projecting corner.
the omission of a word or words.
the word or words omitted.
Northern British Dialect. an outing.
verb (used without object)
to go or come out.
to become public, evident, known, etc.: The truth will out.
to make known; tell; utter (followed by with ): Out with the truth!
verb (used with object)
to eject or expel; discharge; oust.
to intentionally expose (a secret homosexual, a spy, etc.).
all out, with maximum effort; thoroughly or wholeheartedly: They went all out to finish by Friday.
be on the/atouts with, Informal. to be estranged from (another person); be unfriendly or on bad terms with: He is on the outs with his brother.
out and away, to a surpassing extent; far and away; by far: It was out and away the best apple pie she had ever eaten.
out for, aggressively determined to acquire, achieve, etc.: He's out for all the money he can get.
out from under, out of a difficult situation, especially of debts or other obligations: The work piled up while I was away and I don't know how I'll ever get out from under.
out of,
not within: out of the house.
beyond the reach of: The boat's passengers had sailed out of hearing.
not in a condition of: out of danger.
so as to deprive or be deprived of.
from within or among: Take the jokers out of the pack.
because of; owing to: out of loyalty.
foaled by (a dam): Grey Dancer out of Lady grey.
out of it, Informal.
not part of or acceptable within an activity, social group, or fashion: She felt out of it because none of her friends were at the party.
not conscious; drunk or heavily drugged.
not alert or clearheaded; confused; muddled.
eliminated from contention: If our team loses two more games, we'll be out of it.
out of sight. sight ( def 25 ).
out of trim, Nautical. (of a ship) drawing excessively at the bow or stern.

before 900; (adv.) Middle English; Old English ūt; cognate with Dutch uit, German aus, Old Norse, Gothic ūt; akin to Sanskrit ud-; (adj., interjection, and preposition) Middle English, from the adv.; (v.) Middle English outen, Old English ūtian to put out, cognate with Old Frisian ūtia

Dictionary.com Unabridged


a prefixal use of out, adv., occurring in various senses in compounds (outcast, outcome, outside ), and serving also to form many transitive verbs denoting a going beyond, surpassing, or outdoing in the particular action indicated (outbid, outdo, outgeneral, outlast, outstay, outrate ).

Middle English; Old English ūt-; see out

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
out (aʊt)
1.  (often used as a particle) at or to a point beyond the limits of some location; outside: get out at once
2.  (particle) out of consciousness: she passed out at the sight of blood
3.  (particle) used to indicate a burst of activity as indicated by the verb: fever broke out
4.  (particle) used to indicate obliteration of an object: the graffiti were painted out
5.  (particle) used to indicate an approximate drawing or description: sketch out; chalk out
6.  public; revealed: the secret is out
7.  (often used as a particle) away from one's custody or ownership, esp on hire: to let out a cottage
8.  on sale or on view to the public: the book is being brought out next May
9.  (of a young woman) in or into polite society: Lucinda had a fabulous party when she came out
10.  (of the sun, stars, etc) visible
11.  (of a jury) withdrawn to consider a verdict in private
12.  (particle) used to indicate exhaustion or extinction: the sugar's run out; put the light out
13.  (particle) used to indicate a goal or object achieved at the end of the action specified by the verb: he worked it out; let's fight it out, then!
14.  (preceded by a superlative) existing: the friendliest dog out
15.  an expression in signalling, radio, etc, to indicate the end of a transmission
16.  archaic (Austral), (NZ) in or to Australia or New Zealand: he came out last year
17.  out of
 a.  at or to a point outside: out of his reach
 b.  away from; not in: stepping out of line; out of focus
 c.  because of, motivated by: doing it out of jealousy
 d.  from (a material or source): made out of plastic
 e.  not or no longer having any of (a substance, material, etc): we're out of sugar
18.  not or not any longer worth considering: that plan is out because of the weather
19.  not allowed: smoking on duty is out
20.  (also prenominal) not in vogue; unfashionable: that sort of dress is out these days
21.  (of a fire or light) no longer burning or providing illumination: the fire is out
22.  not working: the radio's out
23.  unconscious: he was out for two minutes
24.  informal (Austral), (NZ) out to it asleep or unconscious, esp because drunk
25.  not in; not at home: call back later, they're out now
26.  desirous of or intent on (something or doing something): I'm out for as much money as I can get
27.  Also: out on strike on strike: the machine shop is out
28.  (in several games and sports) denoting the state in which a player is caused to discontinue active participation, esp in some specified role
29.  used up; exhausted: our supplies are completely out
30.  worn into holes: this sweater is out at the elbows
31.  inaccurate, deficient, or discrepant: out by six pence
32.  not in office or authority: his party will be out at the election
33.  completed or concluded, as of time: before the year is out
34.  in flower: the roses are out now
35.  in arms, esp, in rebellion: one of his ancestors was out in the Forty-Five
36.  (also prenominal) being out: the out position on the dial
37.  informal not concealing one's homosexuality
38.  out of; out through: he ran out the door
39.  archaic, dialect or outside; beyond: he comes from out our domain
40.  a.  an exclamation, usually peremptory, of dismissal, reproach, etc
 b.  (in wireless telegraphy) an expression used to signal that the speaker is signing off
41.  out with it a command to make something known immediately, without missing any details
42.  chiefly (US) a method of escape from a place, difficult situation, punishment, etc
43.  baseball an instance of the putting out of a batter; putout
44.  printing
 a.  the omission of words from a printed text; lacuna
 b.  the words so omitted
45.  ins and outs See in
46.  (tr) to put or throw out
47.  (intr) to be made known or effective despite efforts to the contrary (esp in the phrase will out): the truth will out
48.  informal (tr) (of homosexuals) to expose (a public figure) as being a fellow homosexual
49.  informal (tr) to expose something secret, embarrassing, or unknown about (a person): he was eventually outed as a talented goal scorer
usage  The use of out as a preposition, though common in American English, is regarded as incorrect in British English: he climbed out of (not out) a window; he went out through the door

1.  excelling or surpassing in a particular action: outlast; outlive
2.  indicating an external location or situation away from the centre: outpost; outpatient
3.  indicating emergence, an issuing forth, etc: outcrop; outgrowth
4.  indicating the result of an action: outcome

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

O.E. ut, common Gmc. (cf. O.N., O.Fris., Goth. ut, Du. uit, Ger. aus), from PIE base *ud- "up, up away" (cf. Skt. ut "up, out," uttarah "higher, upper, later, northern;" Avestan uz- "up, out," O.Ir. ud- "out," L. usque "all the way to, without interruption," Gk. hysteros "the latter," Rus. vy- "out").
Meaning "unconscious" is attested from 1898, originally in boxing. Sense of "not popular or modern" is from 1966. The verb was O.E. utian "expel," used in many senses over the years. Meaning "to expose as a closet homosexual" is first recorded 1990; as an adj. meaning "openly avowing one's homosexuality" it dates from 1970s (see closet; senses of "into public view" have been present in out since 16c.). Noun sense in baseball (1860) was originally from cricket, where it is attested from 1746. Adverbial phrase out-and-out "thoroughly" is attested from early 14c.; adj. usage is attested from 1813; out-of-the-way (adj.) "remote, secluded" is attested from late 15c. Out-of-towner "one not from a certain place" is from 1911. Shakespeare's It out-herods Herod ("Hamlet") reflects Herod as stock braggart and bully in old religious drama and was widely imitated 19c. Out to lunch "insane" is student slang from 1955; out of this world "excellent" is from 1938; out of sight "excellent, superior" is from 1891.
Online Etymology Dictionary, © 2010 Douglas Harper
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Computing Dictionary

out definition

A type or "mode" of function parameter that passes information in one direction - from the function to the caller. An "out" parameter thus provides an additional return value, typically for languages that don't have good support for returning data structures like lists. Other modes are in and inout.
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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American Heritage
Idioms & Phrases


In addition to the idioms beginning with out, also see ace out; act out; all out; ask out; back out; bail out; bang out; bawl out; bear out; beat one's brains out; beat out; belt out; bent out of shape; black out; bliss out; blot out; blow one's brains out; blow out; blurt out; bottom out; bow out; branch out; brave out; break out; break out of; bring out; bug out; bum out; burn out; burst into (out); buy out; call out; camp out; cancel out; card in (out); carry out; cast out; check out; chew out; chicken out; chill out; churn out; clean out; clear out; clock in (out); close out; come out; come out ahead; come out in the wash; come out of; come out with; conk out; cool off (out); cop out; count out; crank out; crap out; crop out; cry (out) for; cut it out; cut out; day after day (day in, day out); deal out; deck out; die out; dig out; dine out on; dish out; do out of; dope out; down and out; drag on (out); draw out; drop out; drown out; drum out; dry out; duck out; ease out; eat someone out of house and home; eat one's heart out; eat out; eat out of one's hand; edge out; eke out; fade out; fall out; farm out; far out; feel out; ferret out; fight it out; figure out; fill out; find out; fish out; fish out of water; fit out; fizzle out; flake out; flat out; flesh out; flip one's lid (out); flunk out; follow out; for crying out loud; fork over (out); freak out; freeze out; fresh out of; get out; get out of; get the lead out; give out; go out; go out of one's way; gross out; grow out of; gut it out; hammer out; hand out; hang out; hang out one's shingle; hang out to dry; hash over (out); have an out; have it out; have one's work cut out; head out; hear out; heart goes out to; help out; hide out; hire out; hit out; hold out; in (out of) favor; in one ear and out the other; in (out of) one's element; in (out of) one's hair; in (out of) print; in (out of) reach; ins and outs; inside out; into (out of) thin air; in (out of) tune; iron out; jury is still out; keep an eye out; kick out; knock out; knock the bottom out; lash out; lay out; leave out; let out; let the cat out of the bag; light out; like a bat out of hell; live out; lock out; log in (out); look out; look out for; lose out; luck out; make a mountain out of a molehill; make capital out of; make out; max out; mellow out; miss out on; murder will out; muster in (out); nose out; nose out of joint; odd man out; on the outs; on the way out; opt out; pan out; parcel out; pass out; pay out; peter out; phase in (out); pick out; pig it (out); played out; play out; point out; poop out; pound out; pour out; price out of the market; print out; prove out; psych out; pull out; pull out all the stops; pull out of a hat; pull the rug out; punch in (out); put one out; put oneself out; put out; put out feelers; put someone out of his or her misery; put out to grass; puzzle out; rack out; rain out; read out of; ride out; right out; right-side out; roll out; root out; round off (out); rough out; rub out; rule out; run out of; run out on; sack in (out); scare out of one's wits; screw someone out of; see out; sell out; set out; settle (wipe out) old scores; shell out; ship out; shut out; sign out; sing out; single out; sit out; skip out; sleep out; slip out; smoke out; snap out of it; sniff out; snuff out; sound out; space out; spell out; spin out; stake out; stamp out; stand out; start out; step out; stick one's neck out; stick out; straighten out; stress out; strike out; string out; strung out; swear out; sweat out; take a leaf out of someone's book; take it out on; take out; take the wind out of someone's sails; talked out; talk out; talk out of; tease out; tell tales (out of school); think out; thrash out; throw out; time out; tired out; top out; trick out; trot out; truth will out; try out; tuckered out; tune out; turn out; wait out; walk out; want in (out); washed out; wash out; wear out; weasel out; weave in and out; weed out; well out of; whacked out; wig out; win out; wipe out; work out; worm out of; write out; year in, year out; zap out.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Example sentences
But after spending five days trapped in its depths, he knew getting out alive
  would require drastic action.
Gas and heat seeping through the side of the volcano melt the snowpack above,
  carving out a cave.
Bringing a beloved champ out of retirement and back into the ring is always
We went to search out snow leopard sign in a gorge glistening with river ice.
Idioms & Phrases
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