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Word of the Day Tuesday, June 9, 2026

lunatic

/luːˈnætɪk/ adjective · British & US
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What does lunatic mean?

adjective

A person who is considered to be mentally ill or irrational; a person who behaves in a wildly unpredictable or uncontrolled manner.

Example

"The firework display was so loud that it sent the children running in a lunatic frenzy."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for lunatic

Antonyms of lunatic

Rhymes with lunatic

Etymologically related