adjective falser fals′er, falsest fals′·est

1. not true; in error; incorrect; mistaken a false argument
2. untruthful; lying; dishonest a false witness
3. disloyal; unfaithful a false friend
4. deceiving or meant to deceive; misleading a false scent
5. not real; artificial; counterfeit false teeth
6. not properly so named; deceptively resembling false jasmine
7. based on wrong or mistaken ideas false pride
8. Mech. temporary, nonessential, or added on for protection, disguise, etc. a false drawer
9. Music pitched inaccurately

Etymology: ME < OFr < fals < L falsus, pp. of fallere, to deceive: see fail

adverb falser fals′er, falsest fals′·est