Faulty functioning. / Failure to function.

To function improperly. / To fail to function.

plural of malfunction

Third-person singular simple present indicative form of malfunction

present participle of malfunction

A malfunction.

simple past tense and past participle of malfunction

plural of malfunctioning

Not functioning as intended.

(euphemistic) An accidental instance of indecent exposure caused by a fault in someone's clothing (especially that of a performer) or by an error made while changing clothes.