Co

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Symbol, Chemistry.

cobalt.

QUIZ

QUIZ YOURSELF ON "WAS" VS. "WERE"!

Were you ready for a quiz on this topic? Well, here it is! See how well you can differentiate between the uses of "was" vs. "were" in this quiz.

Question 1 of 7

“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.

true

false

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Other definitions for Co (2 of 9)

abbreviation

Colorado (approved especially for use with zip code).

commanding officer.

conscientious objector.

Other definitions for Co (3 of 9)

co-

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)

c/o

care of.

Bookkeeping. carried over.

cash order.

Other definitions for Co (5 of 9)

c.o.

abbreviation

care of.

carried over.

Other definitions for Co (6 of 9)

Co.

or co.

abbreviation

Company.

County.

Other definitions for Co (7 of 9)

C/o

care of.

Bookkeeping. carried over.

Other definitions for Co (8 of 9)

C/O

cash order.

certificate of origin.

Other definitions for Co (9 of 9)

C.O.

abbreviation

cash order.

Commanding Officer.

conscientious objector.

correction officer.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use Co in a sentence

The effort to sterilize his image first began when Epstein hired Los Angeles-based spin doctors Sitrick Co.
Sleazy Billionaire’s Double Life Featured Beach Parties With Stephen Hawking|M.L. Nestel|January 8, 2015|DAILY BEAST
Reached Tuesday, a Sitrick Co. rep confirmed they parted ways with Epstein in April 2011.
Sleazy Billionaire’s Double Life Featured Beach Parties With Stephen Hawking|M.L. Nestel|January 8, 2015|DAILY BEAST
They say it's frightening how the real CIA is perceived to be as clueless as Archer Co.
‘Archer’ Creator Adam Reed Spills Season 6 Secrets, From Surreal Plotlines to Life Post-ISIS|Marlow Stern|January 8, 2015|DAILY BEAST
Eva Silverman, who co-hosts an Oakland Dinner Party, agrees.
Everyone at This Dinner Party Has Lost Someone|Samantha Levine|January 6, 2015|DAILY BEAST

But probably because we co-edited the Deadline Artists anthologies with our friend Jesse Angelo, we feel a fidelity to the form.
The Best Columns of 2014|John Avlon, Errol Louis|December 31, 2014|DAILY BEAST
In this case, I suspect, there was co-operant a strongly marked childish characteristic, the love of producing an effect.
Children's Ways|James Sully
The conception of the relation of this institution with them as co-operative makes headway slowly.
Readings in Money and Banking|Chester Arthur Phillips
Then they were to co-operate with an army moving up from Arkansas, and the State would be redeemed.
The Courier of the Ozarks|Byron A. Dunn
And the Process or Method of study, if it be an Assimilating one, also compels this co-operation.
Assimilative Memory|Marcus Dwight Larrowe (AKA Prof. A. Loisette)
The leaguers were now anxious to co-operate with the Americans in compelling the Spaniards to evacuate the Archipelago.
The Philippine Islands|John Foreman

British Dictionary definitions for Co (1 of 7)

the internet domain name for

a commercial company (used with a country domain name)

Colombia

British Dictionary definitions for Co (2 of 7)

Co¹

the chemical symbol for

cobalt

British Dictionary definitions for Co (3 of 7)

Co²

abbreviation for

County

British Dictionary definitions for Co (4 of 7)

Co³

co

abbreviation for

(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)

abbreviation for

Commanding Officer

Commonwealth Office

conscientious objector

Colorado

Colombia (international car registration)

British Dictionary definitions for Co (6 of 7)

co-

prefix

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)

c/o

abbreviation for

care of

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

Medical definitions for Co (1 of 3)

The symbol for the elementcobalt

Medical definitions for Co (2 of 3)

abbr.

cardiac output

Medical definitions for Co (3 of 3)

co-

pref.

Together; joint; jointly; mutually:coaptation.

Subordinate or auxiliary:coenzyme.

To the same extent or degree:codominant.

Scientific definitions for Co

The symbol for cobalt.