False

Untrue, not factual, factually incorrect.
Based on factually incorrect premises.
Spurious, artificial.
(logic) Of a state in Boolean logic that indicates a negative result.
Uttering falsehood; dishonest or deceitful.
Not faithful or loyal, as to obligations, allegiance, vows, etc.; untrue; treacherous.
Not well founded; not firm or trustworthy; erroneous.
Not essential or permanent, as parts of a structure which are temporary or supplemental.
(music) Out of tune.