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English definition of “fat”

fat

adjective [-er/-est only]  /fæt/ (-tt-) us  

fat adjective [-er/-est only] (FLESHY)

having a lot of flesh on the body: Her weight’s normal but she insists she’s fat. Fat can also mean thick or big: a fat telephone book

fat adjective [-er/-est only] (WEALTHY)

infml having or worth a lot of money: a fat profit
Idioms

fat

noun [C/U]  /fæt/ us  

fat noun [C/U] (SUBSTANCE)

biology the substance under the skin of humans and animals that stores energy and keeps them warm Fat is also a solid or liquid substance obtained from animals or plants and used esp. in cooking.
(Definition of fat from the Cambridge Academic Content Dictionary © Cambridge University Press)
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