Definition of "davy"

davy¹

/ˈdeɪvi/

noun
plural davies
1. An affidavit, a legally binding statement or oath
  Quotations
  "You and me should get on well, Hawkins, for I'll take my davy I should be rated ship's boy."
  1881–1882, Robert Louis Stevenson, Treasure Island, London, Paris: Cassell & Company, published 14 November 1883

davy²

/ˈdeɪvi/

noun
plural davys or davies
1. A Davy lamp, a type of safety lamp.
  Quotations
  He also developed the innovative davy lamp for use in coal mines.
  2009, Cutler J. Cleveland, Christopher G. Morris, editors, Dictionary of Energy: Expanded Edition, Elsevier, published 2009, page 124