co

1 of 5

abbreviation (1)

1

company

2

county

Co

2 of 5

symbol

cobalt

CO

3 of 5

abbreviation (2)

1

cash order

2

Colorado

3

commanding officer

4

conscientious objector

5

corrections officer

c/o

4 of 5

abbreviation (3)

care of

co-

5 of 5

prefix

1

: with : together : joint : jointly

coexist

coheir

2

: in or to the same degree

coextensive

3

a

: one that is associated in an action with another : fellow : partner

coauthor

coworker

b

: having a usually lesser share in duty or responsibility : alternate : deputy

copilot

4

: of, relating to, or constituting the complement of an angle

cosine

Word History

Etymology

Prefix

borrowed from Latin, variant of com- before a vowel, h, and gn — more at com-

Note: The original distribution of co- and com- with its variants has been lost in English and co- is now used before words beginning with any sound, especially in senses 3a and b.

Kids Definition

co-

prefix

1

: with : together : joint : jointly

coexist

coauthor

2

: in or to the same degree

coextensive

3

: fellow : partner

coworker

Etymology

Prefix

derived from Latin com- "with, together"

Medical Definition

Co

1 of 4 abbreviation

coenzyme

Co

2 of 4 symbol

cobalt

CO

3 of 4 abbreviation

cardiac output

c/o

4 of 4 abbreviation

complains of

Legal Definition

c/o

1 of 4 abbreviation

care of

co

2 of 4 abbreviation

1

company

2

county

CO

3 of 4 abbreviation

1

commanding officer

2

conscientious objector

3

corrections officer

co-

4 of 4 prefix

1

: with : together : joint : jointly

codefendant

2

a

: associated in an action with another : fellow

co-conspirator

b

: having a usually lesser share in duty or responsibility : alternate : deputy

co-counsel