Source : Webster's Revised Unabridged Dictionary (1913)

Bunker \Bun"ker\, n.
   1. A small sand hole or pit, as on a golf course. [Scot.]
      --Sir W. Scott.

   2. (Golf) Hence, any rough hazardous ground on the links;
      also, an artificial hazard with built-up faces.

Bunker \Bun"ker\, v. t. (Golf)
   To drive (the ball) into a bunker.

Bunker \Bun"ker\, n. [Scot. bunker, bunkart, a bench, or low
   chest, serving for a seat. Cf. {Bunk}, {Bank}, {Bench}.]
   1. A sort of chest or box, as in a window, the lid of which
      serves for a seat. [Scot.] --Jamieson.

   2. A large bin or similar receptacle; as, a coal bunker.

Source : WordNet®

bunker
     n 1: a hazard on a golf course [syn: {sand trap}, {trap}]
     2: a fortification of earth; mostly or entirely below ground
        [syn: {dugout}]
     v 1: hit a golf ball into a bunker
     2: fill (a ship's bunker) with coal or oil
     3: transfer cargo from a ship to a warehouse