- US Canadian a measure of the proportion of gold in an alloy, expressed as the number of parts of gold in 24 parts of the alloy
Also spelt (in Britain and certain other countries): carat
WordReference Random House Learner's Dictionary of American English © 2019
- Jewelrya unit for measuring the amount of pure gold in a mixture of gold, pure gold being 24 karats:fourteen karats of gold.[singular before a noun]eighteen-karat gold.
- Jewelrya unit for measuring the fineness of gold, pure gold being 24 karats fine. Abbr.: k., kt.
- spelling, spelled variant of carat 1550–60