To frighten or deter from accomplishing a purpose by
making a show of confidence in one’s strength or resources; as, he
bluffed me off.

To act as in the game of bluff.

A high, steep bank, as by a river or the sea, or beside a
ravine or plain; a cliff with a broad face.

To deter (an opponent) from taking the risk of betting on
his hand of cards, as the bluffer does by betting heavily on his own
hand although it may be of less value.

An act of bluffing; an expression of self-confidence for the
purpose of intimidation; braggadocio; as, that is only bluff, or a
bluff.

Abrupt; roughly frank; unceremonious; blunt; brusque; as, a
bluff answer; a bluff manner of talking; a bluff sea captain.

Rising steeply with a flat or rounded front.

Having a broad, flattened front; as, the bluff bows of a
ship.

Surly; churlish; gruff; rough.

A game at cards; poker.