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tinfoil definition

tin·foil (tin′fo̵il′)

noun

  1. tin or an alloy of tin and lead in a very thin sheet or sheets, used in insulation, etc.
  2. aluminum in a very thin sheet, used for wrapping food, etc.

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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