bluff
1. [ noun ] (geography) a high steep bank (usually formed by river erosion)
Related terms: bank
2. [ noun ] pretense that your position is stronger than it really is
Examples:

"his bluff succeeded in getting him accepted"

Related terms: pretense
3. [ verb ] frighten someone by pretending to be stronger than one really is
Related terms: frighten
4. [ verb ] (games) deceive an opponent in a card game by a bold bet on an inferior hand with the result that the opponent withdraws a winning hand
Synonyms: bluff_out
Related terms: move card_game
5. [ adjective ] bluntly direct and outspoken but good-natured
Examples:

"a bluff but pleasant manner" "a bluff and rugged natural leader"

Related terms: direct
6. [ adjective ] very steep; having a prominent and almost vertical front
Synonyms: sheer bold
Examples:

"a bluff headland" "where the bold chalk cliffs of England rise" "a sheer descent of rock"

Related terms: steep
7. [ noun ] (cards) the act of bluffing in poker; deception by a false show of confidence in the strength of your cards
Synonyms: four_flush
Related terms: deception