Bluff \Bluff\, v. t. [imp. & p. p. Bluffed; p. pr. & vb. n. Bluffing.]

1. (Poker) 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. [U. S.]

2. 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. [Colloq.]

Source: Webster's Revised Unabridged Dictionary (1913)
 

Bluff \Bluff\, v. i. To act as in the game of bluff.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Bluff \Bluff\, a. [Cf. OD. blaf flat, broad, blaffaert one with a broad face, also, a boaster; or G. verbl["u]ffen to confuse, LG. bluffen to frighten; to unknown origin.]

1. Having a broad, flattened front; as, the bluff bows of a ship. ``Bluff visages.'' --Irving.

2. Rising steeply with a flat or rounded front. ``A bluff or bold shore.'' --Falconer.

Its banks, if not really steep, had a bluff and precipitous aspect. --Judd.

3. Surly; churlish; gruff; rough.

4. Abrupt; roughly frank; unceremonious; blunt; brusque; as, a bluff answer; a bluff manner of talking; a bluff sea captain. ``Bluff King Hal.'' --Sir W. Scott.

There is indeed a bluff pertinacity which is a proper defense in a moment of surprise. --I. Taylor.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Bluff \Bluff\, n.

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

Beach, bluff, and wave, adieu. --Whittier.

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

3. A game at cards; poker. [U.S.]

--Bartlett.

Source: Webster's Revised Unabridged Dictionary (1913)