outfall

from WordNet (r) 3.0 (2006)

outfall
    n 1: the outlet of a river or drain or other source of water

from The Collaborative International Dictionary of English v.0.48

Outfall \Out"fall`\ (out"f[add]l`), n.
   1. The mouth of a river; the lower end of a water course; the
      open end of a drain, culvert, etc., where the discharge
      occurs.
      [1913 Webster]

   2. A quarrel; a falling out. [Prov. Eng.]
      [1913 Webster]