1. Uttering falsehood; unveracious; given to deceit; dishnest; as, a false witness.
2. Not faithful or loyal, as to obligations, allegiance, vows, etc.; untrue; treacherous; perfidious; as, a false friend, lover, or subject; false to promises. I to myself was false, ere thou to me. (Milton)
3. Not according with truth or reality; not true; fitted or likely to deceive or disappoint; as, a false statement.
4. Not genuine or real; assumed or designed to deceive; counterfeit; hypocritical; as, false tears; false modesty; false colours; false jewelry. False face must hide what the false heart doth know. (Shak)
5. Not well founded; not firm or trustworthy; erroneous; as, a false claim; a false conclusion; a false construction in grammar. Whose false foundation waves have swept away. (Spenser)
6. Not essential or permanent, as parts of a structure which are temporary or supplemental.
7. Not in tune. False arch, construction works to facilitate the erection of the main work, as scaffolding, bridge centering, etc.
Origin: L. Falsus, p.p. Of fallere to deceive; cf. OF. Faus, fals, f. Faux, and as. Fals fraud. See Fail, fall.