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malfunction

[mal-fuhngk-shuh n]
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noun
  1. failure to function properly: a malfunction of the liver; the malfunction of a rocket.
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verb (used without object)
  1. to fail to function properly.
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Origin of malfunction

First recorded in 1925–30; mal- + function
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for malfunction

malfunction

verb
  1. (intr) to function imperfectly or irregularly or fail to function
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noun
  1. failure to function or defective functioning
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for malfunction

n.

1827, from mal- "bad, badly, wrong" + function. As a verb, by 1888. Related: Malfunctioned; malfunctioning.

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Online Etymology Dictionary, © 2010 Douglas Harper

malfunction in Medicine

malfunction

(măl-fŭngkshən)
v.
  1. To fail to function.
  2. To function improperly.
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n.
  1. Failure to function.
  2. Faulty or abnormal functioning.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.