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Synonyms

malfunction

American  
[mal-fuhngk-shuhn] / mælˈfʌŋk ʃən /

noun

  1. failure to function properly.

    a malfunction of the liver; the malfunction of a rocket.


verb (used without object)

  1. to fail to function properly.

malfunction British  
/ mælˈfʌŋkʃən /

verb

  1. (intr) to function imperfectly or irregularly or fail to function

"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

noun

  1. failure to function or defective functioning

"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

Etymology

Origin of malfunction

First recorded in 1925–30; mal- + function

Explanation

To malfunction is to fail to work properly. If your toaster spits out a charred, smoky mess no matter what setting it’s on, your toaster is definitely malfunctioning. When something functions, it works. Adding the prefix -mal (meaning "bad") to function indicates bad or unsuccessful functioning. When a computer malfunctions, you could lose your data. A malfunctioning car could cause an accident or leave you stranded. This word is typically used in reference to technology, tools, and gadgets. However, if you make a stupid mistake, you might joke that your brain has malfunctioned.

Keep Reading on Vocabulary.com

Vocabulary lists containing malfunction

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A string of self-driving robotaxis owned by Chinese internet giant Baidu stalled in central China, stranding passengers after an apparent "system malfunction", police said Wednesday.

From Barron's • Apr. 1, 2026

The report states that the fuze that was used in the exercise is “extremely reliable” and had only one previous recorded malfunction, in 2017.

From Los Angeles Times • Mar. 16, 2026

A KC-135 crashed in 2013 when a tanker taking off from a base in Kyrgyzstan experienced a flight-control-system malfunction.

From The Wall Street Journal • Mar. 13, 2026

Later, Sri Lanka said it had provided sanctuary for Iris Bushehr on 5 March, a day after it requested for docking following an engine malfunction.

From BBC • Mar. 9, 2026

I felt a nudge against my shoulder, but my brain continued to malfunction.

From "Sir Fig Newton and the Science of Persistence" by Sonja Thomas