Not performing its proper or intended function.

(chiefly medicine) A failure to function in an expected or complete manner. Usually refers to a disorder in a bodily organ (e.g. erectile dysfunction), a mental disorder, or the improper behavior of a social group.

(nonstandard, intransitive, chiefly biology) To fail to function correctly; to malfunction.

plural of dysfunction

present participle of dysfunction

simple past tense and past participle of dysfunction

(medicine, pathology) The inability of a male to achieve or sustain an erection. Abbreviation: ED

(dated) attention deficit hyperactivity disorder

(pathology) An umbrella term covering pain and dysfunction of the muscles of mastication (the muscles that move the jaw) and the temporomandibular joints (the joints which connect the mandible to the skull).

plural of temporomandibular joint dysfunction