crazy - Dictionary Definition : Vocabulary.com

Use the adjective crazy to describe actions that aren't sensible, like the crazy way your brothers run around the house when their favorite team wins a game.

Crazy can also mean "insane," though in today's world, it is offensive to apply it to those who struggle with mental illness. Instead, stick with using crazy to describe temporary and more light-hearted situations like being crazy about a new boyfriend or girlfriend or going "football crazy" during the Super Bowl.

PRIMARY MEANINGS OF: crazy

1	adj n	affected with madness or insanity someone deranged and possibly dangerous
2	adj	intensely enthusiastic about or preoccupied with
3	adj	bizarre or fantastic

FULL DEFINITIONS OF: crazy

1

adj affected with madness or insanity

Synonyms:: brainsick, demented, disturbed, mad, sick, unbalanced, unhinged

: insane
afflicted with or characteristic of mental derangement

adj foolish; totally unsound

“a crazy scheme”

Synonyms:: half-baked, screwball, softheaded

: impractical
not practical; not workable or not given to practical matters

n someone deranged and possibly dangerous

Synonyms:: looney, loony, nutcase, weirdo

Type of:: lunatic, madman, maniac
an insane person

2

adj intensely enthusiastic about or preoccupied with

“crazy about cars and racing”

Synonyms:: dotty, gaga, wild

: enthusiastic
having or showing great excitement and interest

adj possessed by inordinate excitement

“the crowd went crazy”

“was crazy to try his new bicycle”

Synonyms: excited
in an aroused state

3

adj bizarre or fantastic

“had a crazy dream”

“wore a crazy hat”

Synonyms: strange, unusual
being definitely out of the ordinary and unexpected; slightly odd or even a bit weird