a large container or compartment for storing fuel

a coal bunker

a reinforced underground shelter, typically for use in wartime

a hollow filled with sand, used as an obstacle on a golf course

fill the fuel containers of (a ship); refuel

(of a player) have one's ball lodged in a bunker

he was bunkered at the fifth hole

take refuge in a bunker or other shelter

his family had bunkered down inside their home

the former Governor has spent four days bunkered down at Government House