(a) a small office or booth staffed by one or more police officers (now chiefly in Japan); (b) a telephone (or earlier, telegraph) kiosk specially…

Something which affords a refuge from danger, attack, pursuit, or observation; a place of safety; Military a wall or bank behind which persons can…

an air-raid shelter or similar structure constructed wholly or mostly at ground level, as opposed to underground.

a small prefabricated air-raid shelter devised by Mr. (later Sir) William Paterson, a Scottish engineer, and adopted while Sir John Anderson was…

Hence, an underground air-raid shelter.

(originally more fully Morrison Table Shelter) a transportable indoor steel table-shaped air-raid shelter. Now historical.

an underground tube station used as an air-raid shelter; also attributive.