C/O

abbr. care of.

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1. cash order.

2. certificate of origin.

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abbrev

Care of

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c/​o abbreviation

care of: used in an address on a letter or parcel that you are sending to someone at another person’s house

Mr J. Mason, c/​o Mrs M. Smith, 100 Larkhill Road

Thesaurus: abbreviations in letters and correspondence_hyponym

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co-,

prefix. a form of com- (Cf. ↑com-).

1. with; together: »

Cooperate = to act with or together.

2. joint; fellow: »

Coauthor = a joint or fellow author.

3. equally: »

Coextensive = equally extensive.

4. Mathematics. complement: »

Cosine = sine of the complement (of a given angle or arc).

╂[< Latin co-, variant of com- with < cum with]

c/o (no periods) or c.o.,

1. carried over.

2. in care of.

Co (no period),

cobalt (chemical element).

Co. or co.,

1. company.

2. county.

CO (no periods) or C.O.,

an abbreviation for the following:

1. cash order.

2. Colorado (with postal Zip Code).

3. commanding officer.

4. Informal. conscientious objector.

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abbr.

■ care of

■ carried over

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abbr

care of

◇ This abbreviation is used in addresses when you are sending a letter or package to a person by using someone else's address or the address of a company.

The letter was addressed to “John Smith c/o Merriam-Webster, Inc.”

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c/o [c/o] [ˌsiː ˈəʊ] [ˈoʊ] abbreviation

(used on letters to a person staying at sb else's house) care of

•

Mr P Brown, c/o Ms M Jones