not based on reality; untrue or incorrect
false allegations
not according to law or rules; invalid
intended to deceive; artificial
false eyelashes
a false smile
illusory
a false sense of security
disloyal or treacherous
used in names of plants, animals, and gems: resembling a more widely known kind
false oats
false diamond
play somebody false
to deceive somebody; to treat them in a false manner
falsely adv
falseness noun
falsity noun
[Middle English fals via Old French from Latin falsus, past part. of fallere to deceive]