false in WordNet English dictionary

1. adopted in order to deceive
   "an assumed name"; "an assumed cheerfulness"; "a fictitious address"; "fictive sympathy"; "a pretended interest"; "a put-on childish voice"; "sham modesty"
   assumed  false  fictitious  fictive  pretended  put on  sham 
   
2. inappropriate to reality or facts
   "delusive faith in a wonder drug"; "delusive expectations"; "false hopes"
   delusive  false 
   
3. not genuine or real; being an imitation of the genuine article
   "it isn't fake anything; it's real synthetic fur"; "faux pearls"; "false teeth"; "decorated with imitation palm leaves"; "a purse of simulated alligator hide"
   fake  false  faux  imitation  simulated 
   
4. not in accordance with the fact or reality or actuality
   "gave false testimony under oath"; "false tales of bravery"
   false 
   
5. designed to deceive
   "a suitcase with a false bottom"
   false 
   
6. (used especially of persons) not dependable in devotion or affection; unfaithful
   "a false friend"; "when lovers prove untrue"
   false  untrue 
   
7. arising from error
   "a false assumption"; "a mistaken view of the situation"
   false  mistaken 
   
8. inaccurate in pitch
   "a false (or sour) note"; "her singing was off key"
   false  off-key  sour 
   
9. deliberately deceptive
   "false pretenses"
   false 
   
10. erroneous and usually accidental
    "a false start"; "a false alarm"
    false 
    

1. in a disloyal and faithless manner
   "he behaved treacherously"; "his wife played him false"
   faithlessly  traitorously  treacherously  treasonably  false  faithlessly  traitorously  treacherously  treasonably  false