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2017 Word of the Year

I.D.

2.
3.
Military. Infantry Division.
4.
Intelligence Department.
Origin of I.D.
1950-1955
First recorded in 1950-55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Word Origin and History for I.D.

also ID (but pronounced as separate letters), short for identification, attested from 1955.

Online Etymology Dictionary, © 2010 Douglas Harper
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