Definition of “rat” - English Dictionary

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

“rat” in American English

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ratnoun [ C ]

us /ræt/

rat noun [ C ] (ANIMAL)

a small animal that looks like a large mouse:

A rat was sniffing around the trash.

rat noun [ C ] (PERSON)

infml an unpleasant person who deceives or is not loyal

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