Meaning of “co-” in the English Dictionary

"co-" in British English

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co-prefix

uk /kəʊ-/ us /koʊ-/

Co.noun [ U ]

uk /kəʊ/ us /koʊ/

COnoun

uk /ˌsiːˈəʊ/ us /ˌsiːˈoʊ/

(Definition of “co-” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"co-" in American English

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co-prefix

us /koʊ/

together; with:

co-author
co-founder
They were named co-winners of the player of the week award.

Co.noun [ U ]

us /ˈkʌm·pə·ni, koʊ/

abbreviation forcompany :

Doubleday & Co., publishers

(Definition of “co-” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"co-" in Business English

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co-prefix

uk /kəʊ-/ us

together, or with someone else; used to form verbs:

co-direct/co-found/co-manage

along with someone else; used to form nouns:

co-chairman/co-director/co-manager
co-ownership

Co.noun [ U ]

uk us

abbreviation for company :

Ford Motor Co.
Tiffany & Co.

(Definition of “co-” from the Cambridge Business English Dictionary © Cambridge University Press)