Etymology: Middle English fals, faus, from Anglo-French & Latin; Anglo-French, from Latin falsus, from past participle of fallere to deceive
Date: 12th century
1: not genuine <false documents><false teeth> 2 a: intentionally untrue <false testimony>b: adjusted or made so as to deceive <false scales><a trunk with a false bottom>c: intended or tending to mislead <a false promise> 3: not true <false concepts> 4 a: not faithful or loyal :treacherous<a false friend>b: lacking naturalness or sincerity <false sympathy> 5 a: not essential or permanent —used of parts of a structure that are temporary or supplemental b: fitting over a main part to strengthen it, to protect it, or to disguise its appearance <a false ceiling> 6: inaccurate in pitch <a false note> 7 a: based on mistaken ideas <false pride>b: inconsistent with the facts <a false position><a false sense of security> 8: threateningly sudden or deceptive <don't make any false moves>