a prefix meaning “with,” “together,” “in association,” and (with intensive force) “completely,” occurring in loanwords from Latin (commit): used in the formation of compound words before b, p, m: combine; compare; commingle.
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Origin of com-
< Latin, variant of preposition cum with
Words nearby com-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for com-
together; with; jointlycommingle
Word Origin for com-
from Latin com-; related to cum with. In compound words of Latin origin, com- becomes col- and cor- before l and r, co- before gn, h, and most vowels, and con- before consonants other than b, p, and m. Although its sense in compounds of Latin derivation is often obscured, it means: together, with, etc (combine, compile) ; similar (conform); extremely, completely (consecrate)
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
Medical definitions for com-
Together; with; joint; jointly:commensalism.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.