Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • intransitive verb To fail to function properly.
  • noun A failure to function properly.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun faulty functioning
  • noun failure to function
  • verb to function improperly
  • verb to fail to function

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • verb fail to function or function improperly
  • noun a failure to function normally

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From mal- ("bad, incorrect") + function

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