Dictionary.com Unabridged

cons.

1
(in prescriptions) conserve; keep.

Origin:
< Latin conservā

con

1 [kon]
adverb
1.
against a proposition, opinion, etc.: arguments pro and con.
noun
2.
the argument, position, arguer, or voter against something.
Compare pro1.


Origin:
1575–85; short for Latin contrā in opposition, against

con

2 [kon]
verb (used with object), conned, conning.
1.
to learn; study; peruse or examine carefully.
2.
to commit to memory.

Origin:
before 1000; Middle English cunnen, Old English cunnan variant of can1 in sense “become acquainted with, learn to know”

con

3 [kon] Nautical.
verb (used with object), conned, conning.
1.
to direct the steering of (a ship).
noun
2.
the station of the person who cons.
3.
the act of conning.
Also, conn.


Origin:
1350–1400; earlier cond, apocopated variant of Middle English condie, condue < Middle French cond(u)ire < Latin condūcere to conduct

con

4 [kon] Informal.
adjective
1.
involving abuse of confidence: a con trick.
verb (used with object), conned, conning.
2.
to swindle; trick: That crook conned me out of all my savings.
3.
to persuade by deception, cajolery, etc.
noun
4.
a confidence game or swindle.
5.
a lie, exaggeration, or glib self-serving talk: He had a dozen different cons for getting out of paying traffic tickets.

Origin:
1895–1900, Americanism; by shortening of confidence

con

5 [kon]
noun Slang.
a convict.

Origin:
1715–25; by shortening

con

6 [kon]
verb (used with object), conned, conning. British Dialect.
1.
to strike, hit, or rap (something or someone).
2.
to hammer (a nail or peg).
3.
to beat or thrash a person with the hands or a weapon.

Origin:
1890–95; perhaps akin to French cognée hatchet, cogner to knock in, drive (a nail) home

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
con1 (kɒn)
 
n
1.  a.  short for confidence trick
 b.  (as modifier): con man
 
vb , cons, conning, conned
2.  (tr) to swindle or defraud
 
[C19: from confidence]

con2 (kɒn)
 
n
1.  an argument or vote against a proposal, motion, etc
2.  a person who argues or votes against a proposal, motion, etc
 
[from Latin contrā against, opposed to]

con3 (kɒn)
 
n
slang short for convict

con or esp (US) nautical conn4 (kɒn)
 
vb , cons, conns, conning, conned
1.  (tr) to direct the steering of (a vessel)
 
n
2.  the place where a person who cons a vessel is stationed
 
[C17 cun, from earlier condien to guide, from Old French conduire, from Latin condūcere; see conduct]
 
conn or esp (US) nautical conn4
 
vb
 
n
 
[C17 cun, from earlier condien to guide, from Old French conduire, from Latin condūcere; see conduct]

con5 (kɒn)
 
vb , cons, conning, conned
archaic (tr) to study attentively or learn (esp in the phrase con by rote)
 
[C15: variant of can1 in the sense: to come to know]

con6 (kɒn)
 
prep
music with
 
[Italian]

Cons. or cons.
 
abbreviation for
1.  Conservative
2.  Constitution
3.  Consul
 
cons. or cons.
 
abbreviation for

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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Etymonline
Word Origin & History

con
"negation" (mainly in pro and con), 1570s, short for L. contra "against" (see contra).

con
"study," from O.E. cunnan "to know, know how" (see can (v.)).

con
"swindle," 1889, Amer.Eng., from confidence man (1849), from the many scams in which the victim is induced to hand over money as a token of confidence. Confidence with a sense of "assurance based on insufficient grounds" dates from 1590s. Con also can be a slang or colloquial shortening of several other
con- words in English, e.g., from the 19th century, confidant, conundrum, conformist, contract, and from the 20th century, convict, conductor.

con
"to guide ships," 1626, from Fr. conduire, from L. conducere (see conduce).
Online Etymology Dictionary, © 2010 Douglas Harper
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Slang Dictionary

con definition


  1. n.
    a convict. : Is that guy in the gray pajamas one of the escaped cons?
  2. n.
    a confidence scheme. : They pulled a real con on the old lady.
  3. tv.
    to swindle or deceive someone. : Don't try to con me. I know the score.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw-Hill Education.
Cite This Source
FOLDOC
Computing Dictionary

CONS definition


connection-oriented network service

cons definition


/konz/ or /kons/ [LISP, "construct"] A Lisp function which takes an element H and a list T and returns a new list whose head is H and whose tail is T.
In Lisp, "cons" is the most fundamental operation for building structures. It actually takes any two objects and returns a "dotted-pair" or two-branched tree with one object hanging from each branch. Because the result of a cons is an object, it can be used to build binary trees of any shape and complexity.
[Jargon File]
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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American Heritage
Abbreviations & Acronyms
con
  1. confidence game

  2. convict

CON
certificate of need
cons.
  1. consigned

  2. consignment

  3. consonant

  4. constable

  5. constitution

  6. construction

  7. consul

Cons.
  1. Constitution

  2. conservative

  3. consul

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
However, none really seemed to state what the pros and cons may be of either.
So you've batted around the pros and cons and decided to seek another
  tenure-track job.
Other cons: people who don't have my cell number can't look up my number in the
  directory.
Consolidation among small private colleges would have similar pros and cons.
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