What does bunker mean?
A bunker is a heavily fortified structure, typically built partly or wholly underground, designed to shield its occupants from bombs, shellfire, or other attacks. Military installations, government command centres, and civilian air-raid shelters all take this form, and by extension the word evokes a defensive, closed-off state of mind, as in the phrase 'bunker mentality.' The word has an entirely separate, well-established life in golf, where it denotes a sand-filled hazard that punishes errant shots. It also functions as a verb in golfing contexts, meaning to land a ball in such a hazard, and historically it named a compartment for storing coal aboard ships and locomotives. Derived from Scots, where it originally referred to a chest, seat, or storage bin, the word broadened over the centuries as its uses multiplied. Today it is a common, neutral noun whose military associations lend it an undertone of urgency and concealment, while its golfing sense keeps it firmly rooted in everyday sporting vocabulary.
A fortified underground shelter protecting occupants from bombs or gunfire; also, in golf, a sand-filled hazard; formerly, a coal-storage compartment on a ship.
"The dictator spent his final days hiding in an underground bunker as enemy troops closed in."
The military and golf senses are both standard; context makes clear which applies.
To hit a golf ball into a bunker.
"She bunkered her second shot and had to settle for bogey."
Used almost exclusively in golfing contexts, usually in passive or past-tense constructions like 'was bunkered.'
Standard regular plural; common in golf when referring to multiple hazards on a course.
"The course is notorious for its deep, punishing bunkers guarding every green."
The word 'bunker' began life not as a military shelter but as a Scottish word for a chest or bench — and golfers adopted it for their dreaded sand traps before soldiers made it famous.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of bunker
The word 'bunker' entered English through Scots, where it was used from at least the sixteenth century for a chest, box, or seat, and later for a bin storing coal or grain. Its ultimate origin is uncertain, though it may be connected to the Scandinavian-derived word 'bunk' for a sleeping place. During the nineteenth century it was applied to coal compartments on ships, and by the late nineteenth century golfers were using it for sand hazards on links courses. Its modern military sense of a fortified concrete shelter became widespread during the First and Second World Wars, cementing the meaning dominant today.
Related word forms
How bunker is actually used
The military sense dominates everyday usage and carries connotations of siege mentality — phrases like 'bunker mentality' suggest defensiveness and paranoia. The golf sense is universal among players, though many Americans casually call it a 'sand trap,' a term professionals avoid since bunkers need not contain sand under the rules of golf. The fuel-storage sense survives mainly in maritime and rail contexts.
Easily confused with bunker
A bunk is a built-in bed, especially one fixed above another, whereas a bunker is a fortified shelter or a golf sand hazard.