Definition of "pepperbox" in English

noun

1. A pepper shaker.

2. (firearms) A repeating firearm with three or more barrels grouped around a central axis.

3. A buttress at one side of the court in the game of fives.

4. (architecture) A tower capped by a cupola, looking similar to a giant pepper shaker.

5. (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.