CO-

prefix

Etymology: Middle English, from Latin, from com-; akin to Old English ge-, perfective, associative, and collective prefix, Old High German gi-, ga-, Gothic ga-, Old Irish com-, con- with, together, Albanian kë-, Greek koinos common

1. : with : together : joint : jointly : shared : mutual : mutually

co exist

co inheritance

co sustain

co operate

2. : in or to the same degree

co extensive

co eval

3.

a. : fellow : partner

co author

co -worker

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

co chairman

co pilot

4.

a. : operating together or reciprocally

co term

b. : of the complement of an angle

co sine

co declination