Source : Webster's Revised Unabridged Dictionary (1913)

Domesday \Domes"day`\, n.
   A day of judgment. See {Doomsday}. [Obs.]

   {Domesday Book}, the ancient record of the survey of most of
      the lands of England, made by order of William the
      Conqueror, about 1086. It consists of two volumes, a large
      folio and a quarto, and gives the proprietors' tenures,
      arable land, woodland, etc. [Written also {Doomsday
      Book}.]

Doomsday \Dooms"day`\, n. [AS. d?mes d[=a]g. See {Doom}, and
   {Day}.]
   1. A day of sentence or condemnation; day of death. ``My
      body's doomsday.'' --Shak.

   2. The day of the final judgment.

            I could not tell till doomsday.       --Chaucer.

   {Doomsday Book}. See {Domesday Book}.