"functioning abnormally," 1915, from dysfunction + -al (1). Related: Dysfunctionally.
"failure to function, abnormality or impairment of function," 1914, from dys- "bad, abnormal, difficult" + function (n.). Originally in anatomy and medicine; in sociology by 1949.
1917, variant of dysfunctional (q.v.).
updated on October 23, 2018