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lunatic

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The definition of a lunatic is a person who is either actually crazy or who is acting crazy and wild in his behavior.

(noun)

A crazy person is an example of a lunatic.
A person who behaves in a really wild and bizarre manner is an example of a lunatic.

Lunatic is defined as someone or something that is wild, crazy or absurd.

(adjective)

Wild and crazy behavior is an example of something that would be described as lunatic behavior.

See lunatic in Webster's New World College Dictionary

adjective

suffering from lunacy; insane
of or characterized by lunacy
of or for insane persons
utterly foolish

Origin: ME lunatik < OFr lunatique < LL lunaticus, moon-struck, crazy < L luna, the moon: see light

noun

an insane person

See lunatic in American Heritage Dictionary 4

adjective

Suffering from lunacy; insane.
Of or for the insane.
Wildly or giddily foolish: a lunatic decision.
Characterized by lunacy or eccentricity.

Origin:

Origin: Middle English lunatik

Origin: , from Old French lunatique

Origin: , from Latin lūnāticus

Origin: , from lūna, moon; see leuk- in Indo-European roots

Related Forms:

luˈna·tic noun

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