Of a piece of equipment or machinery is failed to function normally. Crash, break down, stop working, failure, collapse.
“The computer has malfunctioned”. A failure to function normally. A failure to work or operate correctly. A fault in the way a machine or part of.
The definition of a malfunction is something that does not work properly.
Adding the prefix (mal) is meaning bad, to defined of the function indicates bad or unsuccessful functioning. “A software problem is causing the system to malfunction”.