bunkers
noun
Definitions
A hardened shelter, often buried partly or fully underground, designed to protect the inhabitants from falling bombs or other attacks.
A large container or bin for storing coal, often built outside in the yard of a house. Now rare, as different types of fuels and energy sources are being used.
A container for storing coal or fuel oil for a ship's engine. [Also, by extension] the quantity of fuel needed to replenish that container.
The coal compartment on a tank engine.