资料来源 : Webster's Revised Unabridged Dictionary (1913)

Drain \Drain\, n.
   1. The act of draining, or of drawing off; gradual and
      continuous outflow or withdrawal; as, the drain of specie
      from a country.

   2. That means of which anything is drained; a channel; a
      trench; a water course; a sewer; a sink.

   3. pl. The grain from the mashing tub; as, brewers' drains.
      [Eng.] --Halliwell.

   {Box drain}, {Counter drain}. See under {Box}, {Counter}.

   {Right of drain} (Law), an easement or servitude by which one
      man has a right to convey water in pipes through or over
      the estate of another. --Kent.