a large bin or receptacle; a fixed chest or box: a coal bunker.
2.
a fortification set mostly below the surface of the ground with overhead protection provided by logs and earth or by concrete and fitted with openings through which guns may be fired.
3.
Golf. any obstacle, as a sand trap or mound of dirt, constituting a hazard.
–verb (used with object)
4.
Nautical.
a.
to provide fuel for (a vessel).
b.
to convey (bulk cargo except grain) from a vessel to an adjacent storehouse.
5.
Golf. to hit (a ball) into a bunker.
6.
to equip with or as if with bunkers: to bunker an army's defenses.
Origin: 1750–60; earlier bonkar (Scots) box, chest, serving also as a seat, of obscure orig.
[buhng-ker] 
