Meaning of “carat” in the English Dictionary

"carat" in British English

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caratnoun [ C ]

uk /ˈkær.ət/ us /ˈker.ət/ written abbreviation ct.

a unit for measuring the weight of jewels (= precious stones)

UK US karat a unit for measuring how pure gold is:

24-carat gold is the purest.

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

"carat" in American English

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caratnoun [ C ]

us /ˈkær·ət/

a unit for measuring the weight of jewels:

The diamonds had a combined weight of 5.87 carats.

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

"carat" in Business English

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caratnoun [ C ]

uk /ˈkærət/ us MEASURES

a unit of weight equal to 200 milligrams, used for measuring the weight of precious stones:

a 10-carat diamond ring

also karat a unit used for measuring how pure gold is:

an 18-carat gold bracelet

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