- The definition of a malfunction is something that does not work properly.
An example of a malfunction is a broken piece of equipment in a stereo system.
- Malfunction is defined as to not work properly.
An example of malfunction is for a computer to stop working.
This computer is experiencing a serious malfunction.
Origin of malfunctionmal- + function
intransitive verbmal·func·tioned, mal·func·tion·ing, mal·func·tions
(third-person singular simple present malfunctions, present participle malfunctioning, simple past and past participle malfunctioned)