adjective
1. impaired in function; especially of a bodily system or organ
• Similar to: ↑impaired
• Derivationally related forms: ↑dysfunction
2. (of a trait or condition) failing to serve an adjustive purpose
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dysfunctional behavior
• Syn: ↑nonadaptive
• Similar to: ↑maladaptive
Useful english dictionary. 2012.