an attempt to deceive someone into believing that one can or is going to do something

the offer was denounced as a bluff

his game of bluff

try to deceive someone as to one's abilities or intentions

he's been bluffing all along

they bluffed their way past the sentries

the object is to bluff your opponent into submission

direct in speech or behaviour but in a good-natured way

a big, bluff, hearty man

a steep cliff, bank, or promontory

a grove or clump of trees

(of a cliff or a ship's bows) having a vertical or steep broad front