Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “Co”


COMPANY written abbreviation for Company (= name of a business): Williams & CoBusinesses and enterprises
AREA OF COUNTRY written abbreviation for County (= area with its own local government): Co. WexfordLocal government and politicsParts of countries
(Definition of Co from the Cambridge Learner's Dictionary © Cambridge University Press)

Translations of “Co”

Word of the Day


showing a wish to help or bring advantages to others, even if it results in disadvantage for yourself

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More