Dictionary
co-
prefix
: with : together
: associated with another
Full Definition of CO-
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>
- co·act
- co·ac·tion
- co·ac·tive
- co·ac·tor
- co·ad·min·is·tra·tion
- co·an·chor
- co·au·thor
- co·au·thor·ship
- co·cap·tain
- co·cat·a·lyst
- co·chair
- co·chair·man
- co·chair·per·son
- co·chair·wom·an
- co·cham·pi·on
- co·com·pos·er
- co·con·spir·a·tor
- co·coun·sel
- co·cre·ate
- co·cre·ator
- co·cul·ti·vate
- co·cul·ti·va·tion
- co·cul·ture
- co·cu·ra·tor
- co·de·fen·dant
- co·de·sign
- co·de·vel·op
- co·de·vel·op·er
- co·di·rect
- co·di·rec·tion
- co·di·rec·tor
- co·dis·cov·er
- co·dis·cov·er·er
- co·drive
- co·driv·er
- co·ed·it
- co·ed·i·tor
- co·eter·nal
- co·ex·ec·u·tor
- co·fa·vor·ite
- co·fea·ture
- co·fi·nance
- co·found
- co·found·er
- co·head
- co·heir
- co·heir·ess
- co·hold·er
- co·host
- co·host·ess
- co·in·vent
- co·in·ven·tor
- co·in·ves·ti·ga·tor
- co·in·ves·tor
- co·join
- co·lead
- co·lead·er
- co·man·age
- co·man·age·ment
- co·man·ag·er
- co·mem·ber
- co·nom·i·nee
- co–oc·cur
- co–oc·cur·rence
- co–oc·cur·rent
- co–of·fi·cial
- co–or·ga·niz·er
- co–own
- co–own·er
- co–own·er·ship
- co·part·ner
- co·part·ner·ship
- co·pre·sent
- co·pres·i·dent
- co·prince
- co·prin·ci·pal
- co·pris·on·er
- co·pro·cess·ing
- co·pro·duce
- co·pro·duc·er
- co·pro·duc·tion
- co·pro·mot·er
- co·pro·pri·etor
- co·pros·per·i·ty
- co·pub·lish
- co·pub·lish·er
- co·re·cip·i·ent
- co·re·search·er
- co·res·i·dent
- co·res·i·den·tial
- co·rul·er
- co·sce·nar·ist
- co·script
- co·spon·sor
- co·spon·sor·ship
- co·star
- co·sur·fac·tant
- co·ten·ant
- co·trans·duce
- co·trans·duc·tion
- co·trans·fer
- co·trans·port
- co·trust·ee
- co·win·ner
- co·work·er
- co·write
- co·writ·er
See co- defined for English-language learners
See co- defined for kids
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Origin of CO-
Middle English, from Latin, from com-; akin to Old English ge-, perfective and collective prefix, Old Irish com- with
COMANAGER Defined for Kids
co-
prefix
Definition of CO- for Kids
1
: with : together : joint : jointly <cooperate>
2
: in or to the same degree
3
: fellow : partner <coauthor>
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