ab·bre·vi·a·tion

[uh-bree-vee-ey-shuhn]
noun
1.
a shortened or contracted form of a word or phrase, used to represent the whole, as Dr. for Doctor, U.S. for United States, lb. for pound.
2.
an act of abbreviating; state or result of being abbreviated; reduction in length, duration, etc.; abridgment; summary: His abbreviation of his famous monograph, an enormous endeavor in itself, made an excellent introduction to the volume of collected essays of which he was the editor.
3.
a short phrase or reduced form used to represent a larger, more complex idea, situation, set of beliefs, etc.: “Freedom of speech” has become an abbreviation for a wealth of debate—and case law—about protesters' rights. The artist presented an abbreviation of line, plane, and curve; she creates breathtaking abstract representations of bodies you expect to leap off the canvas and start dancing.

Origin:
1400–50; late Middle English abbreviacioun (< Middle French) < Late Latin abbreviātiōn- (stem of abbreviātiō). See abbreviate, -ion

abbreviation, acronym, initialism.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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00:10
Abbreviation is always a great word to know.
So is quincunx. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
Collins
World English Dictionary
abbreviation (əˌbriːvɪˈeɪʃən) [Click for IPA pronunciation guide]
 
n
1.  a shortened or contracted form of a word or phrase used in place of the whole
2.  the process or result of abbreviating

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

abbreviation
mid-15c., from M.Fr. abréviation, from L.L. abbreviationem (nom. abbreviatio), from pp. of abbreviare "make brief," from L. ad "to" + breviare "shorten," from brevis "short, low, little, shallow" (see brief (adj.)).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Cultural Dictionary

abbreviation definition


A shortened form of an expression, usually followed by a period. Dr. is a standard abbreviation for Doctor; MA is a standard abbreviation for Massachusetts.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Its name is an abbreviation for a vulgar expression used by convicts and bikers.
My signature is my first initial, followed by an abbreviation of my last name.
But an abbreviation has to be catchy to be successful.
Explain that this is a special kind of abbreviation called an acronym.
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