The Collaborative International Dictionary of English v.0.48:

Pour \Pour\, v. t. [imp. & p. p. Poured; p. pr. & vb. n.
   Pouring.] [OE. pouren, of uncertain origin; cf. W. bwrw to
   cast, throw, shed, bwrw gwlaw to rain.]
   1. To cause to flow in a stream, as a liquid or anything
      flowing like a liquid, either out of a vessel or into it;
      as, to pour water from a pail; to pour wine into a
      decanter; to pour oil upon the waters; to pour out sand or
      dust.
      [1913 Webster]

   2. To send forth as in a stream or a flood; to emit; to let
      escape freely or wholly.
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            I . . . have poured out my soul before the Lord. --1
                                                  Sam. i. 15.
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            Now will I shortly pour out my fury upon thee.
                                                  --Ezek. vii.
                                                  8.
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            London doth pour out her citizens !   --Shak.
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            Wherefore did Nature pour her bounties forth
            With such a full and unwithdrawing hand ? --Milton.
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   3. To send forth from, as in a stream; to discharge
      uninterruptedly.
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            Is it for thee the linnet pours his throat ? --Pope.
      [1913 Webster]

WordNet (r) 3.0 (2006):

pouring
    adj 1: flowing profusely; "a gushing hydrant"; "pouring flood
           waters" [syn: gushing, pouring]

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "pouring":
   affluent, blinding, cat-and-doggish, confluent, coursing,
   decurrent, defluent, diffluent, drippy, driving, drizzling,
   drizzly, drumming, flowing, fluent, fluxional, fluxive, gulfy,
   gushing, mazy, meandering, misty, misty-moisty, mizzly, pelting,
   pluvial, pluviose, pluvious, profluent, racing, rainy, running,
   rushing, serpentine, showery, sluggish, streaming, surging, surgy,
   tidal, vortical