Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “dim”


adjective     /dɪm/ (dimmer, dimmest)
NOT BRIGHT not bright or clear : He could hardly see her in the dim light .Darkness and becoming dark
a dim memory/recollection, etc something you remember slightly , but not very wellRemembering, reminding and reminders
STUPID UK informal stupid : He's nice , but a bit dim.Stupid and sillyOf unsound mind
dimly adverb a dimly lit room
(Definition of dim adjective from the Cambridge Learner's Dictionary © Cambridge University Press)

More Learner's Dictionary definitions for “dim”

Definitions of “dim” in other dictionaries

Word of the Day

best man

a male friend or relation of the bridegroom who stands with him and helps him during a marriage ceremony

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