C2nouninformal10K+

UK//ˈluː.nə.tɪk//US//ˈluː.nə.tɪk//

Meaning of Lunatic

In simple words: A person who is crazy or behaves very strangely.

Lunatic in a sentence

How to use Lunatic

Often used in a derogatory way to describe someone perceived as irrational or mentally unstable. Be cautious of context; using 'lunatic' may offend some.

Grammar pattern

standalone noun

Memory hint

Think of a 'moon' that makes people act crazy. 'Luna' means 'moon' in Latin.

Related words

Collocations with Lunatic

  • crazy lunatic
  • dangerous lunatic
  • mad lunatic

Synonyms for Lunatic

  • crazy person
  • madman
  • insane person
  • fool
  • maniac

Opposites of Lunatic

Common mistakes with Lunatic

  • Using 'lunatic' to describe someone without mental illness.
  • Confusing with 'maniac', which has a slightly different meaning.
  • Overusing in serious contexts where a more respectful term is appropriate.

Lunatic appears in

Lunatic in other languages

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Frequently asked questions about Lunatic

What does Lunatic mean?

A person who is crazy or behaves very strangely.

What is the definition of Lunatic?

A person who is considered insane or wildly irrational.

How do you use Lunatic in a sentence?

The scientist was called a lunatic for his bizarre theories.

Can you give another example of Lunatic?

He acted like a lunatic when he found out he won the lottery.

What are synonyms for Lunatic?

Common alternatives include crazy person, madman, insane person, fool, maniac.

What is the opposite of Lunatic?

Opposite meanings include sane, rational, reasonable.

What words go with Lunatic?

It commonly pairs with crazy lunatic, dangerous lunatic, mad lunatic.

What are common mistakes when using Lunatic?

Using 'lunatic' to describe someone without mental illness. Confusing with 'maniac', which has a slightly different meaning. Overusing in serious contexts where a more respectful term is appropriate.

How do you pronounce Lunatic?

US: //ˈluː.nə.tɪk//, UK: //ˈluː.nə.tɪk//. Listen to the audio above to hear native pronunciation.

Is Lunatic formal or informal?

"Lunatic" is informal, so it fits casual conversation with friends and family.

When should I use Lunatic?

Often used in a derogatory way to describe someone perceived as irrational or mentally unstable. Be cautious of context; using 'lunatic' may offend some.

What CEFR level is Lunatic?

"Lunatic" is at C2 level on the CEFR scale.