cra·zy (krā'zē)
adj., -zi·er, -zi·est.

1. Affected with madness; insane.
2. Informal. Departing from proportion or moderation, especially:
   1. Possessed by enthusiasm or excitement: The crowd at the game went crazy.
   2. Immoderately fond; infatuated: was crazy about boys.
   3. Intensely involved or preoccupied: is crazy about cars and racing.
   4. Foolish or impractical; senseless: a crazy scheme for making quick money.

n., pl., -zies.
One who is or appears insane: "To them she is not a brusque crazy, but 'appropriately passionate'" (Mary McGrory).

idiom:

like crazy Informal.

1. To an exceeding degree: They were running around like crazy.

crazily cra'zi·ly adv.
craziness cra'zi·ness n.

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The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

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