co- Meaning in the Cambridge English Dictionary
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Meaning of “co-” in the English Dictionary

"co-" in British English

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co-prefix

uk   /kəʊ-/  us   /koʊ-/
together; with: co-ownership a ​co-writer/​co-author Appalling ​poverty and ​greatwealthcoexist in the ​city.

Co.noun [U]

uk   /kəʊ/  us   /koʊ/

co- noun [U] (BUSINESS)

abbreviation forcompany (= ​business): Peters, Stynes & Co.

co- noun [U] (AREA)

written abbreviation for county noun , when used in ​names: Co. Durham Nassau Co.
Idioms

COnoun

uk   /ˌsiːˈəʊ/  us   /-ˈoʊ/

co- noun (MILITARY)

[C] abbreviation for Commanding Officer: a ​person in ​charge of a ​militaryunit

co- noun (ADDRESS)

written abbreviation for the US ​state of Colorado: used in ​addresses
(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 ​weekaward.

Co.noun [U]

 us   /ˈkʌm·pə·ni, koʊ/
abbreviation for company : 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   us   /kəʊ-/
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)
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