a meeting or formal assembly, as of representatives or delegates, for discussion of and action on particular matters of common concern.
U.S. politics. a representative party assembly to nominate candidates and adopt platforms and party rules.
an agreement, compact, or contract.
an international agreement, especially one dealing with a specific matter, as postal service or copyright.
a rule, method, or practice established by usage; custom: the convention of showing north at the top of a map.
general agreement or consent; accepted usage, especially as a standard of procedure.
Bridge. any of a variety of established systems or methods of bidding or playing that allows partners to convey certain information about their hands.

1375–1425; late Middle English convencio(u)n (< Middle French) < Latin conventiōn- (stem of conventiō) agreement, literally, a coming together. See convene, -tion

anticonvention, adjective
counterconvention, noun
postconvention, adjective
preconvention, noun
proconvention, adjective
unconvention, noun

1. Convention, assembly, conference, convocation name meetings for particular purposes. Convention usually suggests a meeting of delegates representing political, church, social, or fraternal organizations. Assembly usually implies a meeting for a settled or customary purpose, as for discussion, legislation, or participation in a social function. Conference suggests a meeting for consultation and discussion about business or professional problems. Convocation denotes a (church) assembly, the members of which have been summoned for a special purpose; chapel services at some colleges are called convocations. 3. pact, treaty. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To convention
World English Dictionary
convention (kənˈvɛnʃən)
1.  a.  a large formal assembly of a group with common interests, such as a political party or trade union
 b.  the persons attending such an assembly
2.  (US) politics an assembly of delegates of one party to select candidates for office
3.  diplomacy an international agreement second only to a treaty in formality: a telecommunications convention
4.  any agreement, compact, or contract
5.  the most widely accepted or established view of what is thought to be proper behaviour, good taste, etc
6.  an accepted rule, usage, etc: a convention used by printers
7.  bridge Also called: conventional a bid or play not to be taken at its face value, which one's partner can interpret according to a prearranged bidding system
[C15: from Latin conventiō an assembling, agreeing]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source's 21st Century Lexicon
Main Entry:  Convention2
Part of Speech:  n
Definition:  See National Convention's 21st Century Lexicon
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Word Origin & History

c.1440, from L. conventionem (nom. conventio), pp. of convenire (see convene).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
He transgressed the borderlines of convention but he felt emotionally bound to
Our poll, the first taken in the week after the convention, uses a different
  technique from the others.
However by global convention loans are not marked to market, but carried at
  cost and impaired gradually.
Convention holds that politics stops at the water's edge.
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