bluff in WordNet English dictionary

1. the act of bluffing in poker; deception by a false show of confidence in the strength of your cards
   bluff  four flush 
   
2. pretense that your position is stronger than it really is
   "his bluff succeeded in getting him accepted"
   bluff 
   
3. a high steep bank (usually formed by river erosion)
   bluff 
   

1. frighten someone by pretending to be stronger than one really is
   bluff 
   
2. deceive an opponent by a bold bet on an inferior hand with the result that the opponent withdraws a winning hand
   bluff  bluff out 
   

1. very steep; having a prominent and almost vertical front
   "a bluff headland"; "where the bold chalk cliffs of England rise"; "a sheer descent of rock"
   bluff  bold  sheer 
   
2. bluntly direct and outspoken but good-natured
   "a bluff but pleasant manner"; "a bluff and rugged natural leader"
   bluff