The Collaborative International Dictionary of English v.0.48:

Dash \Dash\ (d[a^]sh), v. t. [imp. & p. p. Dashed; p. pr. &
   vb. n. Dashing.] [Of. Scand. origin; cf. Dan daske to beat,
   strike, Sw. & Icel. daska, Dan. & Sw. dask blow.]
   1. To throw with violence or haste; to cause to strike
      violently or hastily; -- often used with against.
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            If you dash a stone against a stone in the botton of
            the water, it maketh a sound.         --Bacon.
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   2. To break, as by throwing or by collision; to shatter; to
      crust; to frustrate; to ruin.
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            Thou shalt dash them in pieces like a potter's
            vessel.                               --Ps. ii. 9.
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            A brave vessel, . . .
            Dashed all to pieces.                 --Shak.
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            To perplex and dash
            Maturest counsels.                    --Milton.
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   3. To put to shame; to confound; to confuse; to abash; to
      depress. --South.
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            Dash the proud gamester in his gilded car. --Pope.
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   4. To throw in or on in a rapid, careless manner; to mix,
      reduce, or adulterate, by throwing in something of an
      inferior quality; to overspread partially; to bespatter;
      to touch here and there; as, to dash wine with water; to
      dash paint upon a picture.
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            I take care to dash the character with such
            particular circumstance as may prevent ill-natured
            applications.                         --Addison.
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            The very source and fount of day
            Is dashed with wandering isles of night. --Tennyson.
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   5. To form or sketch rapidly or carelessly; to execute
      rapidly, or with careless haste; -- with off; as, to dash
      off a review or sermon.
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   6. To erase by a stroke; to strike out; knock out; -- with
      out; as, to dash out a word.
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The Collaborative International Dictionary of English v.0.48:

Dash \Dash\, v. i.
   To rush with violence; to move impetuously; to strike
   violently; as, the waves dash upon rocks.
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         [He] dashed through thick and thin.      --Dryden.
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         On each hand the gushing waters play,
         And down the rough cascade all dashing fall. --Thomson.
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The Collaborative International Dictionary of English v.0.48:

Dash \Dash\, n.
   1. Violent striking together of two bodies; collision; crash.
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   2. A sudden check; abashment; frustration; ruin; as, his
      hopes received a dash.
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   3. A slight admixture, infusion, or adulteration; a partial
      overspreading; as, wine with a dash of water; red with a
      dash of purple.
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            Innocence when it has in it a dash of folly.
                                                  --Addison.
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   4. A rapid movement, esp. one of short duration; a quick
      stroke or blow; a sudden onset or rush; as, a bold dash at
      the enemy; a dash of rain.
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            She takes upon her bravely at first dash. --Shak.
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   5. Energy in style or action; animation; spirit.
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   6. A vain show; a blustering parade; a flourish; as, to make
      or cut a great dash. [Low]
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   7. (Punctuation) A mark or line [--], in writing or printing,
      denoting a sudden break, stop, or transition in a
      sentence, or an abrupt change in its construction, a long
      or significant pause, or an unexpected or epigrammatic
      turn of sentiment. Dashes are also sometimes used instead
      of marks or parenthesis. --John Wilson.
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   8. (Mus.)
      (a) The sign of staccato, a small mark [?] denoting that
          the note over which it is placed is to be performed in
          a short, distinct manner.
      (b) The line drawn through a figure in the thorough bass,
          as a direction to raise the interval a semitone.
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   9. (Racing) A short, spirited effort or trial of speed upon a
      race course; -- used in horse racing, when a single trial
      constitutes the race.
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WordNet (r) 3.0 (2006):

dash
    n 1: distinctive and stylish elegance; "he wooed her with the
         confident dash of a cavalry officer" [syn: dash, elan,
         flair, panache, style]
    2: a quick run [syn: dash, sprint]
    3: a footrace run at top speed; "he is preparing for the
       100-yard dash"
    4: a punctuation mark (-) used between parts of a compound word
       or between the syllables of a word when the word is divided
       at the end of a line of text [syn: hyphen, dash]
    5: the longer of the two telegraphic signals used in Morse code
       [syn: dash, dah]
    6: the act of moving with great haste; "he made a dash for the
       door" [syn: dash, bolt]
    v 1: run or move very quickly or hastily; "She dashed into the
         yard" [syn: dart, dash, scoot, scud, flash,
         shoot]
    2: break into pieces, as by striking or knocking over; "Smash a
       plate" [syn: smash, dash]
    3: hurl or thrust violently; "He dashed the plate against the
       wall"; "Waves were dashing against the rock" [syn: crash,
       dash]
    4: destroy or break; "dashed ambitions and hopes"
    5: cause to lose courage; "dashed by the refusal" [syn: daunt,
       dash, scare off, pall, frighten off, scare away,
       frighten away, scare]
    6: add an enlivening or altering element to; "blue paint dashed
       with white"

Moby Thesaurus II by Grady Ward, 1.0:

623 Moby Thesaurus words for "dash":
   Le Mans, abruptly, aggressiveness, air race, animation, ardor,
   asperge, automobile race, baffle, bafflement, balk, band, bang,
   bar, bash, bat, be poised, beat, beat down, beating, bedew, belt,
   bespatter, besprinkle, betrayed hope, bicycle race, biff, bilk,
   billow, bit, blast, blasted expectation, blatancy, blaze,
   blaze a trail, blazon, blemish, blight, blighted hope, blotch,
   blow, boat race, boil, bolt, bonk, bound, bowl, brand, brave,
   bravura, brazenness, break, brilliancy, brio, buffet, bundle,
   burst, burst of speed, bustle, canter, career, cast, cast down,
   catapult, chalk, chalk up, challenge, charge, chase, check,
   check off, checkmate, chop, chuck, chunk, cicatrize, circumvent,
   clap, clip, clobber, clout, clump, coldcock, colorfulness, comb,
   comedown, confound, confront, contest of speed, contravene,
   counter, counteract, countermand, counterwork, crack, crash, cross,
   cross-country race, cross-hatching, crowd, crudeness,
   cruel disappointment, crush, cut, dabble, damp, dampen,
   dampen the spirits, dapple, daring, darken, dart, dash off,
   dash on, dashed hope, dazzle, dazzlingness, dead run, deal,
   deal a blow, deck, defeat, defeat expectation, define, defy,
   deject, delimit, delineation, demarcate, demonstration, demoralize,
   depress, derby, destroy, dew, diagonal, dig, dint, disappoint,
   disappointment, discolor, discomfit, discomfiture, disconcert,
   discountenance, discourage, dish, dishearten, disillusion,
   disillusionment, dispirit, display, disrupt, dissatisfaction,
   dissatisfy, dog race, dogtrot, dot, dotted line, double-time,
   douche, drag race, dramatics, drive, drop, drub, drubbing,
   drumming, ebb and flow, eclat, elan, elude, endurance race, energy,
   engrave, enterprise, esprit, etalage, exhibition, exhibitionism,
   extravagance, extravaganza, extravagation, failure,
   fallen countenance, false front, fanfaronade, fervor, festinate,
   fetch, fetch a blow, fiasco, figure, fire, fizzle, flagrancy,
   flair, flamboyance, flank speed, flashiness, flat-out speed,
   flaunt, flaunting, fleck, fling, flip, flourish, flummox, flurry,
   flutter, fly, foil, foiling, footrace, force, forced draft, fork,
   forlorn hope, fragment, freckle, frustrate, frustration,
   full gallop, fusillade, gaiety, gallop, garishness, gash, gaudery,
   gaudiness, get going, get moving, get-up-and-go, ginger, glare,
   gleam, glitter, gorgeousness, hachure, hairline, hand gallop,
   haste, hasten, hastily, hatch, hatching, headlong rush, heat,
   heave, heavy right foot, helter-skelter, hie, high lope, hint,
   histrionics, hit, hit a clip, hope deferred, hose, hose down,
   humect, humectate, humidify, hump, hump it, hurdle race, hurl,
   hurry, hurry on, hurry through, hurry up, hurry-scurry, hurtle,
   hustle, idea, impetuously, impress, impression, impressiveness,
   imprint, impulsively, infusion, initiative, inkling, intensity,
   intimation, irrigate, jab, jauntiness, jazziness, jerk, jog trot,
   kick, knock, knock cold, knock down, knock out, knock the chocks,
   lance, lap, lash, launch, leap, let down, let fly, let have it,
   letdown, lick, life, lift, like a flash, like a thunderbolt, line,
   lineation, liveliness, lob, look, lope, lose no time, loudness,
   lower, lower the spirits, luridness, make a mark, make haste,
   manifestation, marathon, marathon race, mark, mark off, mark out,
   match race, maximum speed, meretriciousness, might, mirage,
   moisten, motorcycle race, mottle, move quickly, nick, nip, nonplus,
   notch, obliterate, obstacle race, obtrusiveness, of a sudden,
   on short notice, oomph, open throttle, oppress, overcome, paddle,
   pageant, pageantry, panache, parade, pass, paste, peak, peg, pelt,
   pencil, pep, pepper, perplex, piece, pinch, piquancy,
   piss and vinegar, pitch, pitchfork, pizzazz, plop, plump, plunge,
   plunk, poignancy, point, poke, poop, pop, popple, post,
   potato race, pound, power, precipitantly, precipitately,
   precipitously, press down, press on, prick, print, prostrate,
   psych out, punch, punctuate, puncture, pungency, push, push on,
   put, put the shot, race, raciness, rap, regatta, relay, relay race,
   riddle, rise, rise and fall, road race, roll, ruin, run, rush,
   rush through, sabotage, sack race, sadden, sauce, scamper, scar,
   scarify, scend, scintilla, scoot, score, scotch, scour, scramble,
   scratch, scribble, scud, scurry, scuttle, seal, seam, seasoning,
   send, sensationalism, serve, setback, shade, shadow, shake, sham,
   shamelessness, sharp, shatter, shiver, shoot, show, showiness,
   showing-off, shy, sink, sip, skedaddle, skin, slam, slap, slash,
   sling, slobber, slog, slop, slosh, slug, smack, smash, smattering,
   smell, smidgen, smidgin, smite, snap, soak, sock,
   sore disappointment, soupcon, sparge, spark, sparkle, spatter,
   speck, speckle, spectacle, speed, speedway race, spice, spike,
   spirit, splash, splatter, split, splotch, splurge, spoil, sponge,
   sportiness, spot, spray, spring, sprinkle, sprinkling, sprint,
   sprint race, spunk, spurt, staginess, stain, stamp, starch,
   startlingly, step on it, stigmatize, stock-car race, stonewall,
   streak, streaking, strength, striate, striation, strike, strike at,
   strip, stripe, striping, stroke, stump, style, sublineation,
   sudden, suddenly, suggestion, sup, surge, surprisingly, suspicion,
   swash, swat, swell, swing, swipe, syringe, tad, taint,
   tantalization, tantalize, taste, tattoo, tawdriness, tear, tease,
   tempering, theatrics, thought, three-legged race, throw, thrust,
   thump, thwack, thwart, tick, tick off, tilt, tinct, tincture,
   tinge, tint, torch race, toss, touch, trace, track race, trifle,
   trot, unawares, unbrace, underline, underlining, underscore,
   underscoring, undo, undulate, unexpectedly, unman, unnerve,
   unstring, upset, vaunt, vehemence, verve, vestige, vigor, vim,
   virgule, vivacity, vividness, vulgarness, walk, wallop, water,
   wave, weigh heavy upon, weigh upon, wet, wet down, whack, wham,
   whop, wide-open speed, without notice, without warning, yacht race,
   yerk, zest, zing, zip