sconce

Short definition from Wiktionary

Noun

1. 1
   A fixture for a light, which holds it and provides a screen against wind or against a naked flame or lightbulb.
2. 2
   A fixture for a light, which holds it and provides a screen against wind or against a naked flame or lightbulb: A candlestick (holder for a candle, especially a circular tube, with a brim, into which a candle is inserted), either with a handle for carrying, or with a bracket for attaching to a wall.
3. 3
   A head or a skull.
4. 4
   A poll tax; a mulct or fine.
5. 5
   An act of sconcing; very similar to a fine at Cambridge University, though a sconce is the act of issuing a penalty rather than the penalty itself.
6. 6
   A type of small fort or other fortification, especially as built to defend a pass or ford.
7. 7
   A hut for protection and shelter; a stall.
8. 8
   A squinch.
9. 9
   A fragment of a floe of ice.
10. 10
    A fixed seat or shelf.

Verb

1. 1
   To impose a fine, a forfeit, or a mulct.
2. 2
   During a meal or as part of a drinking game, to announce some (usually outrageous) deed such that anyone who has done it must drink; similar to I have never; commonly associated with crewdates; very similar to fining at Cambridge University.
3. 3
   to shut within a sconce; to imprison.