bun: Meaning and Definition of

bun

1. any of a wide variety of variously shaped bread rolls, usually leavened and slightly sweetened or plain, sometimes containing spices, dried currants, etc.
2. hair gathered into a round coil or knot at the nape of the neck or on top of the head in certain coiffures.
3. the buttocks.

bun

1. to be intoxicated: Everyone at the party seemed to have a bun on.

BUN

1. blood urea nitrogen: the concentration of nitrogen in the blood in the form of urea, indicating kidney function.