Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “lethargic”

lethargic

adjective     /ləˈθɑːdʒɪk/
having no energy and not wanting to do anythingTired and making tiredLacking interest and enthusiasmUnwilling and reluctantNot showing or feeling emotions
lethargy     /ˈleθədʒi/ noun [U] the feeling of being tired and having no energyTired and making tired
(Definition of lethargic adjective from the Cambridge Learner's Dictionary © Cambridge University Press)

Definitions of “lethargic” in other dictionaries

Word of the Day

well in (with)

to have a good relationship with someone in which they like you and from which you get an advantage

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