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Question 1 of 7
Which sentence is correct?
Other definitions for Co (2 of 9)
Colorado (approved especially for use with zip code).
Other definitions for Co (3 of 9)
variant of com- before a vowel, h, and gn:coadjutor; cohabit; cognate. The prefix co- now productively forms new words from bases beginning with any sound (co-conspirator; co-manage; coseismic), sometimes with the derived sense “auxiliary, subsidiary” (coenzyme; copilot), and, in mathematics and astronomy, with the sense “complement” (codeclination).
Other definitions for Co (4 of 9)
Bookkeeping. carried over.
Other definitions for Co (5 of 9)
Other definitions for Co (6 of 9)
Other definitions for Co (7 of 9)
Bookkeeping. carried over.
Other definitions for Co (8 of 9)
certificate of origin.
Other definitions for Co (9 of 9)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use Co in a sentence
“C O U R D O R O Y,” he said, saying each letter and then proudly declaring the word.All Kids Want a Head Start|Eleanor Clift|February 13, 2014|DAILY BEAST
Since it all goes well write me c/o of Bulter address and I will be sure to get them.The Escape of a Princess Pat|George Pearson
"I c-c-c-o-o-ouldn't help it," sputtered Ding-dong sorrowfully.The Motor Rangers Through the Sierras|Marvin West
Well, when we moved here a week and a half ago and got settled a delegation from the ranks waited on the C. O.The Glory of The Coming|Irvin S. Cobb
Would you be kind enough to return the book to me c/o this Institute when you are finished with it?Starman's Quest|Robert Silverberg
While the Columbia grammar boys would reply, “C-o-l-u-m-b-i-a—Burke!”Witch Winnie's Mystery, or The Old Oak Cabinet|Elizabeth W. Champney
British Dictionary definitions for Co (1 of 7)
the internet domain name for
a commercial company (used with a country domain name)
British Dictionary definitions for Co (2 of 7)
the chemical symbol for
British Dictionary definitions for Co (3 of 7)
British Dictionary definitions for Co (4 of 7)
(esp in names of business organizations) Company
and co (kəʊ) informal and the rest of themHarold and co
British Dictionary definitions for Co (5 of 7)
Colombia (international car registration)
British Dictionary definitions for Co (6 of 7)
together; joint or jointly; mutual or mutuallycoproduction
indicating partnership or equalitycofounder; copilot
to the same or a similar degreecoextend
(in mathematics and astronomy) of the complement of an anglecosecant; codeclination
Word Origin for co-
from Latin, reduced form of com-
British Dictionary definitions for Co (7 of 7)
accounting carried over
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
Scientific definitions for Co
The symbol for cobalt.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.