Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “lose”


verb [T] (NOT BE ABLE TO FIND)   /luz/ (past tense and past participle lost  /lɔst/)
to not be able to find something: I lost my keys somewhere in the house. Two officers chased the suspect, but he turned down an alley and they lost sight of him (= could no longer see him).
(Definition of lose verb (NOT BE ABLE TO FIND) from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of lose

Definitions of “lose” in other dictionaries

Word of the Day


a person or group who receives money, advantages, etc. as a result of something else

Word of the Day


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