Thesaurus

lunatic

adjective

Synonyms & Antonyms of lunatic

(Entry 1 of 2)

1 having or showing a very abnormal or sick state of mind
  • he had a lunatic obsession with personal hygiene

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2 showing or marked by a lack of good sense or judgment
  • such lunatic clowning during a solemn ceremony is completely inappropriate

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lunatic

noun

Synonyms & Antonyms of lunatic (Entry 2 of 2)

1 a person having or showing a severely disordered or abnormal state of mind
  • he was raving like a lunatic

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2 a person who lacks good sense or judgment
  • no, you can't ski off the roof, you lunatic!

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Time Traveler

The first known use of lunatic was in the 14th century

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Cite this Entry

“Lunatic.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/lunatic. Accessed 4 Jun. 2020.

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More from Merriam-Webster on lunatic

Dictionary: Definition of lunatic

Rhyming Dictionary: Words that rhyme with lunatic

Medical Dictionary: Definition of lunatic

Spanish Central: Translation of lunatic

Nglish: Translation of lunatic for Spanish Speakers

Britannica English: Translation of lunatic for Arabic Speakers

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