The Collaborative International Dictionary of English v.0.48:

Snort \Snort\, v. i. [imp. & p. p. Snorted; p. pr. & vb. n.
   Snorting.] [OE. snorten; akin to snoren. See Snore.]
   1. To force the air with violence through the nose, so as to
      make a noise, as do high-spirited horsed in prancing and
      play. --Fairfax.
      [1913 Webster]

   2. To snore. [R.] "The snorting citizens." --Shak.
      [1913 Webster]

   3. To laugh out loudly. [Colloq.] --Halliwell.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Snort \Snort\, n.
   The act of snorting; the sound produced in snorting.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Snort \Snort\, v. t.
   To expel throught the nostrils with a snort; to utter with a
   snort. --Keats.
   [1913 Webster]

WordNet (r) 3.0 (2006):

snort
    n 1: a disrespectful laugh [syn: snicker, snort, snigger]
    2: a cry or noise made to express displeasure or contempt [syn:
       boo, hoot, Bronx cheer, hiss, raspberry, razzing,
       razz, snort, bird]
    v 1: indicate contempt by breathing noisily and forcefully
         through the nose; "she snorted her disapproval of the
         proposed bridegroom"
    2: make a snorting sound by exhaling hard; "The critic snorted
       contemptuously"
    3: inhale recreational drugs; "The addict was snorting cocaine
       almost every day"; "the kids were huffing glue" [syn: huff,
       snort]
    4: inhale through the nose [syn: take a hit, snort]

Moby Thesaurus II by Grady Ward, 1.0:

255 Moby Thesaurus words for "snort":
   Homeric laughter, assibilate, assibilation, bark, bawl, be above,
   be contemptuous of, be in stitches, bellow, belly laugh, beverage,
   blare, blat, blow, blubber, boff, boffola, boom, bray, break up,
   breathe, breathe hard, breathe in, breathe out, bumper,
   burst into laughter, burst of laughter, burst out,
   burst out laughing, burst with laughter, bust a gut, buzz,
   cachinnate, cachinnation, cackle, care nothing for, chant, chirp,
   chortle, chuckle, contemn, convulsion, coo, cough, crow, cut,
   cut direct, deride, despise, disdain, disparage, disprize,
   disregard, draft, dram, drawl, drench, drink, drop, dump on,
   effervesce, effervescence, effervescing, exclaim, exhale, exhaust,
   expel, expire, feel contempt for, feel superior to,
   fit of laughter, fizz, fizzle, fizzling, fleer, flute, frication,
   frictional rustling, gales of laughter, gargle, gasp, giggle,
   go into convulsions, growl, grunt, gruntle, guffaw, gulp, guzzle,
   ha-ha, hack, hearty laugh, hee-haw, hee-hee, hiccup, hilarity,
   hiss, hissing, ho-ho, hold beneath one, hold cheap,
   hold in contempt, horselaugh, huff, humiliation, hush, hushing,
   inhale, inspire, insult, jigger, jolt, keen, lap, laugh,
   laugh it up, laugh outright, laughing, laughter, leer, libation,
   lilt, lisp, look down upon, misprize, mumble, murmur, mutter,
   nearly die laughing, nip, oink, outburst of laughter, pant,
   peal of laughter, peg, pipe, portion, potation, potion, puff, pull,
   put down, quaff, rank low, rebuff, repulse, respire, rhonchus,
   ridicule, risibility, roar, roar of laughter, roar with laughter,
   round, round of drinks, rumble, sardonic grin, scorn,
   scornful laugh, scream, screech, set at naught, shake like jelly,
   shake with laughter, shot, shout, shout of laughter, shriek, shush,
   shushing, sibilance, sibilate, sibilation, siffle, sigh, sigmatism,
   sing, sip, siss, sissing, sizz, sizzle, sizzling, slight, slug,
   slurp, smirk, snap, snarl, sneer, sneer at, sneeze, sneeze at,
   sneezing, snicker, sniff, sniff at, sniffle, snifter, snigger,
   snore, snort at, snub, snuff, snuffle, sob, spit, split,
   split with laughter, splutter, spot, spurn, spurning, sputter,
   squall, squash, squawk, squeal, squelch, squish, sternutation,
   stertor, suck, sup, swig, swill, swish, tee-hee, the cold shoulder,
   the go-by, think nothing of, thunder, titter, tot, trumpet, twang,
   wail, warble, wet, wheeze, whine, whish, whisper, whistle,
   whistling, white noise, whiz, whoosh, yap, yawp, yell, yelp, yuck,
   yuk-yuk, zip