1 [bang]
a loud, sudden, explosive noise, as the discharge of a gun.
a resounding stroke or blow: a nasty bang on the head.
Informal. a sudden movement or show of energy: He started with a bang.
energy; vitality; spirit: The bang has gone out of my work.
Informal. sudden or intense pleasure; thrill; excitement: a big bang out of seeing movies.
Slang: Vulgar. sexual intercourse.
Printing and Computer Slang. an exclamation point.
verb (used with object)
to strike or beat resoundingly; pound: to bang a door.
to hit or bump painfully: to bang one's ankle on a chair leg.
to throw or set down roughly; slam: He banged the plates on the table.
Slang: Vulgar. to have sexual intercourse with.
verb (used without object)
to strike violently or noisily: to bang on the door.
to make a loud, sudden, explosive noise like that of a violent blow: The guns banged all night.
Slang: Vulgar. to have sexual intercourse.
suddenly and loudly; abruptly or violently: She fell bang against the wall.
directly; precisely; right: He stood bang in the middle of the flower bed.
Verb phrases
bang into, to collide with; bump into: The truck skidded on the ice and banged into a parked car.
bang up, to damage: A passing car banged up our fender.
bang off, Chiefly British Slang. immediately; right away.
bang on, Chiefly British Slang. terrific; marvelous; just right: That hat is absolutely bang on.

1540–50; 1930–35 for def 5; compare Old Norse banga to beat, hammer, Low German bangen to strike, beat, German dialect banken; perhaps orig. imitative

2. smack, clout, box, wallop, sock, bash, cuff. Unabridged


2 [bang]
Often, bangs. a fringe of hair combed or brushed forward over the forehead.
verb (used with object)
to cut (the hair) so as to form a fringe over the forehead.
to dock (the tail of a horse or dog).

1860–65, Americanism; short for bangtail


3 [bang] ,
noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
bang1 (bæŋ)
1.  a short loud explosive noise, as of the bursting of a balloon or the report of a gun
2.  a hard blow or knock, esp a noisy one; thump: he gave the ball a bang
3.  informal a startling or sudden effect: he realized with a bang that he was late
4.  slang an injection of heroin or other narcotic
5.  taboo, slang an act of sexual intercourse
6.  slang (US), (Canadian) get a bang out of to experience a thrill or excitement from
7.  with a bang successfully: the party went with a bang
8.  to hit or knock, esp with a loud noise; bump: to bang one's head
9.  to move noisily or clumsily: to bang about the house
10.  to close (a door, window, etc) or (of a door, etc) be closed noisily; slam
11.  (tr) to cause to move by hitting vigorously: he banged the ball over the fence
12.  to make or cause to make a loud noise, as of an explosion
13.  (Brit) (tr)
 a.  to cause (stock prices) to fall by rapid selling
 b.  to sell rapidly in (a stock market), thus causing prices to fall
14.  taboo, slang to have sexual intercourse with
15.  slang (intr) to inject heroin, etc
16.  informal bang for one's buck value for money: this option offers more bang for your buck
17.  informal bang goes that is the end of: bang goes my job in Wapping
18.  bang one's head against a brick wall to try to achieve something impossible
19.  with a sudden impact or effect: bang went his hopes of winning; the car drove bang into a lamp-post
20.  precisely: bang in the middle of the road
21.  slang bang to rights caught red-handed
22.  go bang See also bang up to burst, shut, etc, with a loud noise
[C16: from Old Norse bang, banga hammer; related to Low German bangen to beat; all of imitative origin]

bang2 (bæŋ)
1.  a fringe or section of hair cut straight across the forehead
2.  to cut (the hair) in such a style
3.  to dock (the tail of a horse, etc)
[C19: probably short for bangtail short tail]

bang3 (bæŋ)
a variant spelling of bhang

bhang or bang (bæŋ)
See also cannabis a preparation of the leaves and flower tops of Indian hemp, which has psychoactive properties: much used in India
[C16: from Hindi bhāng]
bang or bang
[C16: from Hindi bhāng]

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

1540s, "to strike hard with a loud blow," from O.N. banga "to pound, hammer" of echoic origin. Slang meaning "have sexual intercourse with" first recorded 1937. Bang-up "excellent, first-rate," 1820, probably shortened from phrase bang up to the mark.
"This is the way the world ends
Not with a bang but a whimper"

[T.S. Eliot, "Hollow Men," 1925]
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

Bang (bāng, bäng), Bernhard Lauritz Frederik. 1848-1932.

Danish veterinarian who discovered Brucella abortus, the agent of brucellosis in cattle and of undulant fever in humans.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Computing Dictionary

bang definition

1. A common spoken name for "!" (ASCII 33), especially when used in pronouncing a bang path in spoken hackish. In elder days this was considered a CMUish usage, with MIT and Stanford hackers preferring excl or shriek; but the spread of Unix has carried "bang" with it (especially via the term bang path) and it is now certainly the most common spoken name for "!". Note that it is used exclusively for non-emphatic written "!"; one would not say "Congratulations bang" (except possibly for humorous purposes), but if one wanted to specify the exact characters "foo!" one would speak "Eff oh oh bang".
See pling, shriek, ASCII.
2. An exclamation signifying roughly "I have achieved enlightenment!", or "The dynamite has cleared out my brain!" Often used to acknowledge that one has perpetrated a thinko immediately after one has been called on it.
[Jargon File]

The Free On-line Dictionary of Computing, © Denis Howe 2010
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American Heritage
Idioms & Phrases


In addition to the idioms beginning with bang, also see beat (bang) one's head against the wall; get a bang out of; go over big (with a bang); more bang for the buck.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Example sentences
With a loud bang he threw an empty box on the pile of rubbish in the hallway
  and then went heavily down the stairs.
Suddenly a bang rings out, and the image shakes vigorously as the cameraman
  runs for his life.
So don't bang your head on the office door trying to uncover what you did to
  create an enemy.
Artillery pieces were hauled to the quayside to ensure things went off with a
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