The Collaborative International Dictionary of English v.0.48:

Plash \Plash\, n. [OD. plasch. See Plash, v.]
   1. A small pool of standing water; a puddle. --Bacon. "These
      shallow plashes." --Barrow.
      [1913 Webster]

   2. A dash of water; a splash.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Plash \Plash\, v. i. [imp. & p. p. Plashed; p. pr. & vb. n.
   Plashing.] [Cf. D. plassen, G. platschen. Cf. Splash.]
   To dabble in water; to splash. "Plashing among bedded
   pebbles." --Keats.
   [1913 Webster]

         Far below him plashed the waters.        --Longfellow.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Plash \Plash\, v. t.
   1. To splash, as water.
      [1913 Webster]

   2. To splash or sprinkle with coloring matter; as, to plash a
      wall in imitation of granite.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Plash \Plash\, v. t. [imp. & p. p. Plashed; p. pr. & vb. n.
   Plashing.] [OF. plaissier, plessier, to bend. Cf.
   Pleach.]
   To cut partly, or to bend and intertwine the branches of; as,
   to plash a hedge. --Evelyn.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Plash \Plash\, n.
   The branch of a tree partly cut or bent, and bound to, or
   intertwined with, other branches.
   [1913 Webster]

WordNet (r) 3.0 (2006):

plash
    n 1: the sound like water splashing [syn: splash, plash]
    v 1: interlace the shoots of; "pleach a hedge" [syn: pleach,
         plash]
    2: dash a liquid upon or against; "The mother splashed the
       baby's face with water" [syn: spatter, splatter, plash,
       splash, splosh, swash]