Definition of "False" :

adjective: (used especially of persons) not dependable in devotion or affection; unfaithful

"A false friend."

adjective: arising from error

"A false assumption."

adjective: adopted in order to deceive

adjective: inaccurate in pitch

"A false (or sour) note."

adjective: designed to deceive

"A suitcase with a false bottom."

adjective: not genuine or real; being an imitation of the genuine article

"False teeth."

adjective: inappropriate to reality or facts

"False hopes."

adjective: deliberately deceptive

"False pretenses."

adjective: not in accordance with the fact or reality or actuality

"Gave false testimony under oath."

adjective: erroneous and usually accidental

"A false start."

adverb: in a disloyal and faithless manner

"His wife played him false."