/ ˈbʌŋkə(r); NAmE / noun , verb
■ noun
1.
a strongly built shelter for soldiers or guns, usually underground :
a concrete / underground / secret bunker
2.
a container for storing coal, especially on a ship or outside a house :
a coal bunker
3.
( NAmE also ˈsand trap , trap ) a small area filled with sand on a golf course
—picture at golf
■ verb
[ vn ] be bunkered ( in golf ) to have hit your ball into a bunker (and therefore to be in a difficult position)
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WORD ORIGIN
mid 16th cent. (originally Scots , denoting a seat or bench): perhaps related to bunk narrow bed .