Source : Webster's Revised Unabridged Dictionary (1913)

Spat \Spat\, n. [Short for {Spatterdash}.]
   1. A legging; a gaiter. [Scot. & Dial. Eng.]

   2. A kind of short cloth or leather gaiter worn over the
      upper part of the shoe and fastened beneath the instep; --
      chiefly in pl.

Spat \Spat\,
   imp. of {Spit}. [Obs. or R.]

Spat \Spat\, n. [From the root of spit; hence, literally, that
   which is ejected.]
   A young oyster or other bivalve mollusk, both before and
   after it first becomes adherent, or such young, collectively.

Spat \Spat\, v. i. & t.
   To emit spawn; to emit, as spawn.

Spat \Spat\, n. [Cf. {Pat}.]
   1. A light blow with something flat. [U.S. & Prov. Eng.]

   2. Hence, a petty combat, esp. a verbal one; a little
      quarrel, dispute, or dissension. [U. S.]

Spat \Spat\, v. i.
   To dispute. [R.] --Smart.

Spat \Spat\, v. t. [imp. & p. p. {Spatted}; p. pr. & vb. n.
   {Spatting}.]
   To slap, as with the open hand; to clap together; as the
   hands. [Local, U.S.]

         Little Isabel leaped up and down, spatting her hands.
                                                  --Judd.

Spit \Spit\, v. t. [imp. & p. p. {Spit} ({Spat}, archaic); p.
   pr. & vb. n. {Spitting}.] [AS. spittan; akin to G.
   sp["u]tzen, Dan. spytte, Sw. spotta,Icel. sp?ta, and prob. E.
   spew. The past tense spat is due to AS. sp?tte, from sp?tan
   to spit. Cf. {Spat}, n., {Spew}, {Spawl}, {Spot}, n.]
   1. To eject from the mouth; to throw out, as saliva or other
      matter, from the mouth. ``Thus spit I out my venom.''

Source : WordNet®

spat
     n 1: a quarrel about petty points [syn: {bicker}, {bickering}, {tiff},
           {squabble}, {pettifoggery}, {fuss}]
     2: a cloth covering (a legging) that provides covering for the
        instep and ankles [syn: {spats}, {gaiter}]
     3: a young oyster or other bivalve
     [also: {spatting}, {spatted}]

spat
     v 1: come down like raindrops; "Bullets were spatting down on us"
     2: become permanently attached; "mollusks or oysters spat"
     3: strike with a sound like that of falling rain; "Bullets were
        spatting the leaves"
     4: clap one's hands or shout after performances to indicate
        approval [syn: {applaud}, {clap}, {acclaim}] [ant: {boo}]
     5: engage in a brief and petty quarrel
     6: spawn; "oysters spat"
     7: clap one's hands together; "The children were clapping to
        the music" [syn: {clap}]
     [also: {spatting}, {spatted}]

spit
     v 1: expel or eject (saliva or phlegm or sputum) from the mouth;
          "The father of the victim spat at the alleged murderer"
          [syn: {ptyalize}, {ptyalise}, {spew}, {spue}]
     2: utter with anger or contempt [syn: {spit out}]
     3: rain gently; "It has only sprinkled, but the roads are
        slick" [syn: {sprinkle}, {spatter}, {patter}, {pitter-patter}]
     4: drive a skewer through; "skewer the meat for the BBQ" [syn:
        {skewer}]
     [also: {spitting}, {spitted}, {spat}]

spit
     n 1: a narrow strip of land that juts out into the sea [syn: {tongue}]
     2: a clear liquid secreted into the mouth by the salivary
        glands and mucous glands of the mouth; moistens the mouth
        and starts the digestion of starches [syn: {saliva}, {spittle}]
     3: a skewer for holding meat over a fire
     4: the act of spitting (forcefully expelling saliva) [syn: {spitting},
         {expectoration}]
     [also: {spitting}, {spitted}, {spat}]

spat
     See {spit}
     [also: {spatting}, {spatted}]