Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “rat”

rat

noun [C]     /ræt/
ANIMAL A2 an animal that looks like a large mouse and has a long tail: Rats carry disease.Rodents and similar animals
PERSON informal an unpleasant, dishonest personCheating and trickingPlotting and trappingUnpleasant menUnpleasant people in generalDishonest peopleLies, lying and hypocrisyCheating and tricking
(Definition of rat noun from the Cambridge Learner's Dictionary © Cambridge University Press)

More Learner's Dictionary definitions for “rat”

Definitions of “rat” in other dictionaries

Word of the Day

handout

a document given to students or reporters which contains information about a particular subject

Word of the Day

Blog

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