1. [n]  a hazard on a golf course
2. [n]  a fortification of earth; mostly or entirely below ground
3. [v]  hit a golf ball into a bunker
4. [v]  transfer cargo form a ship to a warehouse
5. [v]  fill a ship's bunker with coal or oil

Bunker
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1. \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.
   

2. \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.
   

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