bunker

n. underground bomb shelter; coal storehouse

A bunker is a defensive military fortification. Bunkers are mostly below ground, compared to blockhouses which are mostly above ground. They were used extensively in World War I and World War II. During the Cold War, massive bunker complexes were built to house both strategic (command & control) infrastructure as well as government personnel and stores for the event of a nuclear war. During that time, bunkers became a part of American culture with people building backyard fallout shelters, though these were not intended to protect against direct attacks as bunkers normally would.
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The term búnker refers to a far-right faction during the Spanish transition to democracy. The group of hardline francoists opposed political and social reform; the group's steadfast refusal to compromise led to the name of "bunker." Under the presidency of Carlos Arias Navarro, bunker and its leading member, José Antonio Girón, opposed any movement towards reform. Blas Piñar also served as one of the groups members.
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Noun
1. a hazard on a golf course
(synonym) sand trap, trap
(hypernym) hazard
(part-holonym) golf course, golf links, links
2. a fortification of earth; mostly or entirely below ground
(synonym) dugout
(hypernym) fortification, munition
(hyponym) foxhole, fox hole
Verb
1. hit a golf ball into a bunker
(hypernym) hit
(derivation) sand trap, trap
2. fill (a ship's bunker) with coal or oil
(hypernym) fuel
3. transfer cargo from a ship to a warehouse
(hypernym) transfer, shift

n. bunker, underground bomb shelter; solitary confinement, imprisonment of a single person in a room or cell that is completely isolated from others

n. bunker