The Collaborative International Dictionary of English v.0.48:

Toss \Toss\, v. t. [imp. & p. p. Tossed ; (less properly
   Tost ); p. pr. & vb. n. Tossing.] [ W. tosiaw, tosio, to
   jerk, toss, snatch, tosa quick jerk, a toss, a snatch. ]
   1. To throw with the hand; especially, to throw with the palm
      of the hand upward, or to throw upward; as, to toss a
      ball.
      [1913 Webster]

   2. To lift or throw up with a sudden or violent motion; as,
      to toss the head.
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            He tossed his arm aloft, and proudly told me,
            He would not stay.                    --Addison.
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   3. To cause to rise and fall; as, a ship tossed on the waves
      in a storm.
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            We being exceedingly tossed with a tempest. --Act
                                                  xxvii. 18.
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   4. To agitate; to make restless.
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            Calm region once,
            And full of peace, now tossed and turbulent.
                                                  --Milton.
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   5. Hence, to try; to harass.
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            Whom devils fly, thus is he tossed of men.
                                                  --Herbert.
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   6. To keep in play; to tumble over; as, to spend four years
      in tossing the rules of grammar. [Obs.] --Ascham.
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   To toss off,
      (a) to drink hastily.
      (b) to accomplish easily or quickly.
      (c) to say in an offhand manner; as, to toss off a
          comment.
      (d) to masturbate; -- British slang.

   To toss the cars.See under Oar, n.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Toss \Toss\, n.
   1. A throwing upward, or with a jerk; the act of tossing; as,
      the toss of a ball.
      [1913 Webster]

   2. A throwing up of the head; a particular manner of raising
      the head with a jerk. --Swift.
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The Collaborative International Dictionary of English v.0.48:

Toss \Toss\, v. i.
   1. To roll and tumble; to be in violent commotion; to write;
      to fling.
      [1913 Webster]

            To toss and fling, and to be restless, only frets
            and enrages our pain.                 --Tillotson.
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   2. To be tossed, as a fleet on the ocean. --Shak.
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   To toss for, to throw dice or a coin to determine the
      possession of; to gamble for.

   To toss up, to throw a coin into the air, and wager on
      which side it will fall, or determine a question by its
      fall. --Bramsion.
      [1913 Webster]

WordNet (r) 3.0 (2006):

toss
    n 1: the act of flipping a coin [syn: flip, toss]
    2: (sports) the act of throwing the ball to another member of
       your team; "the pass was fumbled" [syn: pass, toss,
       flip]
    3: an abrupt movement; "a toss of his head"
    v 1: throw or toss with a light motion; "flip me the beachball";
         "toss me newspaper" [syn: flip, toss, sky, pitch]
    2: lightly throw to see which side comes up; "I don't know what
       to do--I may as well flip a coin!" [syn: flip, toss]
    3: throw carelessly; "chuck the ball" [syn: chuck, toss]
    4: move or stir about violently; "The feverish patient thrashed
       around in his bed" [syn: convulse, thresh, thresh
       about, thrash, thrash about, slash, toss,
       jactitate]
    5: throw or cast away; "Put away your worries" [syn: discard,
       fling, toss, toss out, toss away, chuck out, cast
       aside, dispose, throw out, cast out, throw away,
       cast away, put away]
    6: agitate; "toss the salad"

The Free On-line Dictionary of Computing (19 January 2023):

Terminal Oriented Social Science
TOSS

    (TOSS) The Cambridge Project Project MAC was an
   ARPA-funded political science computing project.  They worked
   on topics like survey analysis and simulation, led by Ithiel
   de Sola Pool, J.C.R. Licklider and Douwe B. Yntema.  Yntema
   had done a system on the MIT Lincoln Labs TX-2 called the
   Lincoln Reckoner, and in the summer of 1969 led a Cambridge
   Project team in the construction of an experiment called TOSS.
   TOSS was like Logo, with matrix operators.  A major
   feature was multiple levels of undo, back to the level of
   the login session.  This feature was cheap on the Lincoln
   Reckoner, but absurdly expensive on Multics.

   (1997-01-29)