malfunction

/ˌmælˌˈfʌŋ(k)ʃən/

/mælˈfʌŋkʃən/

Other forms: malfunctioning; malfunctions; malfunctioned

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.

Definitions of malfunction

1. verb

   fail to function or function improperly
   “the coffee maker malfunctioned”

   synonyms: glitch, misfunction

   antonyms:

   function

   perform as expected when applied

   run

   be operating, running or functioning

   work

   operate in or through

   types:

   jam

   get stuck and immobilized

   type of:

   break, break down, conk out, die, fail, give out, give way, go, go bad

   stop operating or functioning
2. noun

   a failure to work normally
   synonyms: glitch

   types:

   blowout

   a sudden malfunction of a part or apparatus

   stall

   a malfunction in the flight of an aircraft in which there is a sudden loss of lift that results in a downward plunge

   dysfunction

   a failure to sustain social norms or expected conditions

   type of:

   failure

   an event that does not accomplish its intended purpose