1. contrary to fact or truth: false tales of bravery.
2. deliberately untrue: delivered false testimony under oath.
3. arising from mistaken ideas: false hopes of writing a successful novel.
4. intentionally deceptive: a suitcase with a false bottom; false promises.
5. not keeping faith; treacherous: a false friend. see synonyms at faithless.
6. not genuine or real: false teeth; false documents.
7. erected temporarily, as for support during construction.
8. resembling but not accurately or properly designated as such: a false thaw in january; the false dawn peculiar to the tropics.
9. music of incorrect pitch.
10. unwise; imprudent: don't make a false move or I'll shoot.
11. computer science indicating one of two possible values taken by a variable in boolean logic or a binary device.
12. in a treacherous or faithless manner: play a person false.

1. untrue, not factual, factually incorrect.
2. based on factually incorrect premises: false legislation
3. spurious, artificial (as in false teeth).
4. A state in boolean logic that indicates a negative result.

1. uttering falsehood; unveracious; given to deceit; dishnest.
2. not faithful or loyal, as to obligations, allegiance, vows, etc.; untrue; treacherous; perfidious
3. not according with truth or reality; not true; fitted or likely to deceive or disappoint.
4. not genuine or real; assumed or designed to deceive; counterfeit; hypocritical
5. not well founded; not firm or trustworthy; erroneous
6. not essential or permanent, as parts of a structure which are temporary or supplemental.
7. not in tune.
8. not truly; not honestly; falsely.
9. to report falsely; to falsify.
10. to betray; to falsify.
11. to mislead by want of truth; to deceive.
12. to feign; to pretend to make.

1. not in conformity with fact; expressing or comprising what is contrary to fact or truth; erroneous; untrue: as, a false report; a false accusation; a false opinion.
2. giving utterance to what is not true; untruthful; mendacious: as, a false witness.
3. perfidious; treacherous; unfaithful; inconstant; disloyal; dishonest; unjust: said of persons.
4. containing or conveying deception, falsehood, or treachery; adapted or intended to mislead: said of things.
5. irregular; not according to rule or usage: as, false syntax or quantity.
6. not genuine; being other than it appears to be; not real; made in imitation, or to serve the purpose of the genuine article
7. with intent to defraud or deceive; spurious: as, false coin;
8. for the sake of mere appearance or for use or convenience; artificial: as, a false buttonhole; false teeth.
9. technically, in botany and zoology, having some superficial resemblance to some other plant or animal: used like the latin quasi-, or greek pseudo-, in composition. see quasi-, pseudo-.
10. in music, not in tune; inaccurate in pitch; singing or playing out of tune.
11. in heraldry, open or voided: said of some bearings: as, a false cross; a false roundel (an annulet); a false escutcheon (a bordure, or sometimes an orle).
12. in fortification, an artificial mound or bank of earth forming part of a fortification.
13.
14. A falsehood; that which is false.
15. falsely.—
16. to mislead by falsehood; deceive; betray.
17. to defeat; balk; evade.
18. to violate by want of veracity; falsify.
19. to render false, treacherous, or dishonest.
20. to feign, as a blow; aim by way of a feint.
21. to be false; deceive; practise deceit.
22. additional; assistant; subsidiary; supplementary; temporary; used to supplement or temporarily displace something: as, the false work or supports for a bridge which is under construction.

1. in a disloyal and faithless manner
2. not in accordance with the fact or reality or actuality
3. inappropriate to reality or facts
4. adopted in order to deceive
5. inaccurate in pitch
6. erroneous and usually accidental
7. not genuine or real; being an imitation of the genuine article
8. arising from error
9. deliberately deceptive
10. (used especially of persons) not dependable in devotion or affection; unfaithful
11. designed to deceive