The Collaborative International Dictionary of English v.0.48:

Wet \Wet\ (w[e^]t), a. [Compar. Wetter; superl. Wettest.]
   [OE. wet, weet, AS. w[=ae]t; akin to OFries. w[=e]t, Icel.
   v[=a]tr, Sw. v[*a]t, Dan. vaad, and E. water. [root]137. See
   Water.]
   [1913 Webster]
   1. Containing, or consisting of, water or other liquid;
      moist; soaked with a liquid; having water or other liquid
      upon the surface; as, wet land; a wet cloth; a wet table.
      "Wet cheeks." --Shak.
      [1913 Webster]

   2. Very damp; rainy; as, wet weather; a wet season. "Wet
      October's torrent flood." --Milton.
      [1913 Webster]

   3. (Chem.) Employing, or done by means of, water or some
      other liquid; as, the wet extraction of copper, in
      distinction from dry extraction in which dry heat or
      fusion is employed.
      [1913 Webster]

   4. Refreshed with liquor; drunk. [Slang] --Prior.
      [1913 Webster]

   Wet blanket, Wet dock, etc. See under Blanket, Dock,
      etc.

   Wet goods, intoxicating liquors. [Slang]
      [1913 Webster]

   Syn: Nasty; humid; damp; moist. See Nasty.
        [1913 Webster]

WordNet (r) 3.0 (2006):

wetter
    n 1: a chemical agent capable of reducing the surface tension of
         a liquid in which it is dissolved [syn: wetting agent,
         wetter, surfactant, surface-active agent]
    2: a workman who wets the work in a manufacturing process
    3: someone suffering from enuresis; someone who urinates while
       asleep in bed [syn: bedwetter, bed wetter, wetter]