noun
plural -kers
[count] a strong building that is mostly below ground and that is used to keep soldiers, weapons, etc., safe from attacks
golf :an area on a golf course that is filled with sand :sand trap
a container for holding coal, oil, etc., on a ship or outside a house
verb
-kers; -kered; -kering
[+ obj] golf :to hit (a golf ball) into a bunker
to place or store (coal, oil, etc.) in a bunker
US