Noun
A pepper shaker.
(firearms) A repeating firearm with three or more barrels grouped around a central axis.
A buttress at one side of the court in the game of fives.
(architecture) A tower capped by a cupola, looking similar to a giant pepper shaker.
(architecture, slang, chiefly in the plural) Any of the buildings of the Royal Academy and National Gallery in Trafalgar Square, London, having cupolas on the roof.
Source: en.wiktionary.org