[uh m]

pronoun Informal.

them: Put 'em down there.

Origin of 'em

1350–1400; Middle English hem, Old English heom, dative and accusative plural of he1
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British Dictionary definitions for 'em



an informal variant of them
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for 'em

Middle English, now taken as a colloquial abbreviation of them, but originally a form of hem, dative and accusative of the third person plural pronoun.

Online Etymology Dictionary, © 2010 Douglas Harper