The Collaborative International Dictionary of English v.0.48:

Sprinkle \Sprin"kle\, n.
   1. A small quantity scattered, or sparsely distributed; a
      sprinkling.
      [1913 Webster]

   2. A utensil for sprinkling; a sprinkler. [Obs.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sprinkle \Sprin"kle\ (spr[i^][ng]"k'l), v. t. [imp. & p. p.
   Sprinkled (-k'ld); p. pr. & vb. n. Sprinkling
   (-kl[i^]ng).] [OE. sprenkelen, freq. of sprengen to sprinkle,
   to scatter, AS. sprengan, properly, to make to spring,
   causative of springan to spring; akin to D. sprenkelen to
   sprinkle, G. sprengen. See Spring, v. i., and cf.
   Sprent.]
   1. To scatter in small drops or particles, as water, seed,
      etc.
      [1913 Webster]

   2. To scatter on; to disperse something over in small drops
      or particles; to besprinkle; as, to sprinkle the earth
      with water; to sprinkle a floor with sand.
      [1913 Webster]

   3. To baptize by the application of a few drops, or a small
      quantity, of water; hence, to cleanse; to purify.
      [1913 Webster]

            Having our hearts sprinkled from an evil conscience.
                                                  --Heb. x. 22.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sprinkle \Sprin"kle\, v. i.
   1. To scatter a liquid, or any fine substance, so that it may
      fall in particles.
      [1913 Webster]

            And the priest shall . . . sprinkle of the oil with
            his finger seven times before the Lord. --Lev. xiv.
                                                  16.
      [1913 Webster]

   2. To rain moderately, or with scattered drops falling now
      and then; as, it sprinkles.
      [1913 Webster]

   3. To fly or be scattered in small drops or particles.
      [1913 Webster]

WordNet (r) 3.0 (2006):

sprinkle
    n 1: a light shower that falls in some locations and not others
         nearby [syn: scattering, sprinkle, sprinkling]
    2: the act of sprinkling or splashing water; "baptized with a
       sprinkling of holy water"; "a sparge of warm water over the
       malt" [syn: sprinkle, sprinkling, sparge]
    v 1: distribute loosely; "He scattered gun powder under the
         wagon" [syn: scatter, sprinkle, dot, dust,
         disperse]
    2: cause (a liquid) to spatter about, especially with force;
       "She splashed the water around her" [syn: sprinkle,
       splash, splosh]
    3: rain gently; "It has only sprinkled, but the roads are slick"
       [syn: sprinkle, spit, spatter, patter, pitter-
       patter]
    4: scatter with liquid; wet lightly; "Sprinkle the lawn" [syn:
       sprinkle, sparge, besprinkle]

Moby Thesaurus II by Grady Ward, 1.0:

122 Moby Thesaurus words for "sprinkle":
   Scotch mist, asperge, asperse, band, baptize, bar, bedew,
   bespangle, bespatter, bespeckle, bespot, besprinkle, blood rain,
   blotch, bread, check, checker, christen, crumb, dabble, damp,
   dampen, dapple, dash, dew, dip, dot, douche, dredge, drizzle, drum,
   dust, evening mist, fall, flake, fleck, flour, flurry, foam,
   freckle, froth, gout of rain, harlequin, hose, hose down, humect,
   humectate, humidify, immerse, iris, irrigate, maculate, marble,
   marbleize, mist, misty rain, mizzle, moisten, moisture, motley,
   mottle, paddle, patter, pelt, pepper, pimple, pitter-patter, plash,
   polychrome, polychromize, pour, pour with rain, powder,
   precipitate, precipitation, rain, rain tadpoles, rainbow, raindrop,
   rainfall, rainwater, scatter, shake, sheet of rain, shower,
   shower down, slobber, slop, slosh, spangle, sparge, spatter, speck,
   speckle, spindrift, spit, splash, splatter, splotch, sponge, spot,
   spray, spume, stigmatize, stipple, streak, stream, strew, striate,
   stripe, stud, swash, syringe, tattoo, tessellate,
   unfrozen hydrometeor, variegate, vein, water, weep, wet,
   wet down