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]