a strongly built shelter for soldiers or guns, usually underground 地堡；掩体 a concrete/underground/secret bunker 混凝土／地下／秘密掩体
Extra ExamplesTopics Buildingsc2The war cabinet met in an underground bunker. 战时内阁在一个地下掩体中会面。 In preparation for the worst, huge underground bunkers were built. 兴建了大型地堡，以应对最坏的局面。
a container for storing coal, especially on a ship or outside a house 煤舱；煤箱 a coal bunker 煤箱
- (also especially North American English sand trap, trap)
a small area filled with sand on a golf course （高尔夫球场上的）沙坑 
He hit his second shot into a bunker. 他第二次射进了沙坑。 She had a difficult job getting the ball out of the bunker. 她很难把球从沙坑里取出来。
Word Originmid 16th cent. (originally Scots, denoting a seat or bench): perhaps related to bunk ‘narrow bed’.