Drain v. t. [imp. & p. p. Drained p. pr. & vb. n. Draining.]
 1. To draw off by degrees; to cause to flow gradually out or off; hence, to cause the exhaustion of.
    Fountains drain the water from the ground adjacent.   --Bacon.
    But it was not alone that the he drained their treasure and hampered their industry.   --Motley.
 2. To exhaust of liquid contents by drawing them off; to make gradually dry or empty; to remove surface water, as from streets, by gutters, etc.; to deprive of moisture; hence, to exhaust; to empty of wealth, resources, or the like; as, to drain a country of its specie.
 Sinking waters, the firm land to drain,
 Filled the capacious deep and formed the main.   --Roscommon.
 3. To filter.
    Salt water, drained through twenty vessels of earth, hath become fresh.   --Bacon.
 drained
      adj 1: emptied or exhausted of (as by drawing off e.g. water or
             other liquid); "a drained marsh"; "a drained tank"; "a
             drained and apathetic old man...not caring any longer
             about anything" [ant: undrained]
      2: very tired [syn: knackered]
      3: drained of electric charge; discharged; "a dead battery";
         "left the lights on and came back to find the battery
         drained" [syn: dead]