noun

• (Oxford University slang) 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.
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verb

• (obsolete) To impose a fine, a forfeit, or a mulct.
  "The Rector sconced him in the buttery-book, but Webberly “wiped it off, with irreverent and unbeseeming language.” For this, he had to apologise, and go without his commons for three months."
• (Oxford University slang) 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.
  "I sconce anyone who has ever…"

noun

• (obsolete) A hut for protection and shelter; a stall.
  "one that […] must raise a sconce by the highway and sell switches"
• (architecture) A squinch.

verb

• (obsolete) to shut within a sconce; to imprison.