co-


Also found in: Thesaurus, Medical, Legal, Financial, Encyclopedia.

co-

pref.
1. Together; joint; jointly; mutually: coeducation.
2.
a. Partner or associate in an activity: coauthor; cofounder.
b. Subordinate or assistant: copilot.
3. To the same extent or degree: coextensive.
4. Complement of an angle: cotangent.
[Middle English, from Latin, variant of com-, com-.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

co-

prefix
1. together; joint or jointly; mutual or mutually: coproduction.
2. indicating partnership or equality: cofounder; copilot.
3. to the same or a similar degree: coextend.
4. (Mathematics) (in mathematics and astronomy) of the complement of an angle: cosecant; codeclination.
5. (Astronomy) (in mathematics and astronomy) of the complement of an angle: cosecant; codeclination.
[from Latin, reduced form of com-]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

CO

1. Colorado.
2. Commanding Officer.
3. conscientious objector.

Co


Chem. Symbol.
cobalt.

co-

var. of com- before a vowel, h, and gn: coalesce; cohere; cognate. The prefix co-, with the sense “joint, jointly,” now forms new words from bases beginning with any sound (cochair; cogeneration; costar; coworker), sometimes with the derived sense “auxiliary” (coenzyme; copilot), and, in mathematics and astronomy, with the sense “complement” (codeclination).

Co.

or co.,

1. Company.
2. County.

C/O

certificate of origin.

C/o

or c/o,

care of.

C.O.

1. Commanding Officer.
2. conscientious objector.

c.o.

1. care of.
2. carried over.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Translations

co-

[kəʊ] PREFIX → co-
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

co-

[ˈkəʊ-] prefix
to co-produce → coproduire
co-accused n → coaccusé(e) m/f
co-worker → collègue mf
Collins English/French Electronic Resource. © HarperCollins Publishers 2005

co-

pref → Mit-, mit-
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

co-

[kəʊ] pref → co...
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995

co-

(kou) prefix
1. joint or working etc together, as in co-author.
2. with or together, as in co-exist.
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.