A hardened shelter, often buried partly or fully underground, designed to protect the inhabitants from falling bombs or other attacks.
"After hearing the air raid siren, everyone rushed down into the concrete bunker for safety."
hit a golf ball into a bunker
"The player sighed as he had to chip out of the deep sand trap after his previous shot landed right in the bunker."
fill (a ship's bunker) with coal or oil
"The crew worked through the night to bunker the cargo vessel before it set sail for the long voyage across the Pacific."
transfer cargo from a ship to a warehouse
"The dockworkers spent all morning bunkering grain from the incoming vessel into the storage facility before high tide arrived."
To load a vessel with oil or coal for the engine.
"The crew spent all night bunkering the ship before it set sail across the ocean."
A surname.
"My neighbor Bunker always stops by to borrow sugar on Sundays."