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com-

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.
Also, co-, col-, con-, cor-.


Origin:
< Latin, variant of preposition cum with

com.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
com
 
the internet domain name for
a commercial company

COM (kɒm)
 
n
a.  a process in which a computer output is converted direct to microfiche or film, esp 35 or 16 millimetre film
 b.  (as modifier): a COM machine
 
[(C)omputer (O)utput on (M)icrofilm]

Com.
 
abbreviation for
1.  Commander
2.  committee
3.  Commodore

com- or con-
 
prefix
together; with; jointly: commingle
 
[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)]
 
con- or con-
 
prefix
 
[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 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

com-
from L., archaic form of classical L. cum "together, together with, in combination," the prefix sometimes used as an intensive, from PIE *kom- "beside, near, by, with" (cf. O.E. ge-, Ger. ge-). Before vowels and aspirates, reduced to co-; before -g-, assimilated to cog- or con-; before -l-, assimilated
to col-; before -r-, assimilated to cor-; before -c-, -d-, -j-, -n-, -q-, -s-, -t-, -v- assimilated to con-.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

com- or col- or con-
pref.
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.
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FOLDOC
Computing Dictionary

COM definition


1. Component Object Model.
2. Computer Output on Microfilm - see Enterprise Report Management.

com definition

networking
(.com, "commercial") The top-level domain originally for American companies but, since the explosion of the World-Wide Web, used by most companies and for vanity domains of all types, whether in the US or not, often in addition to country code domains like amazon.co.uk.
The term "dot com" is now widely used to refer to any Internet business as in "My dot com turned into a dot bomb".
(2007-02-18)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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American Heritage
Abbreviations & Acronyms
COM
  1. Coma Berenices (constellation)

  2. Comedy Central

  3. computer-output microfilm

  4. computer-output microfilmer

com.
  1. combining

  2. combustion

  3. comedy

  4. comic

  5. comma

  6. commentary

  7. commerce

  8. commission

  9. commissioner

  10. committee

  11. common

  12. commune

  13. communication

  14. community

Com.
  1. commander

  2. commissioner

  3. commodore

  4. commonwealth

  5. communist

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences for COM
Com, a website that allows users to rate and comment on media bias.
Com to receive a free three issue trial subscription to nintendo power.
Com worldwide network of greyhound racing industry participants and fans.
Com provide scheduled services to major destinations throughout the uk and
  europe.
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