Source : Webster's Revised Unabridged Dictionary (1913)

Troll \Troll\, n. [Icel. troll. Cf. {Droll}, {Trull}.] (Scand.
   Myth.)
   A supernatural being, often represented as of diminutive
   size, but sometimes as a giant, and fabled to inhabit caves,
   hills, and like places; a witch.

   {Troll flower}. (Bot.) Same as {Globeflower}
   (a) .

Troll \Troll\, v. i.
   1. To roll; to run about; to move around; as, to troll in a
      coach and six.

   2. To move rapidly; to wag. --F. Beaumont.

   3. To take part in trolling a song.

   4. To fish with a rod whose line runs on a reel; also, to
      fish by drawing the hook through the water.

            Their young men . . . trolled along the brooks that
            abounded in fish.                     --Bancroft.

Troll \Troll\, v. t. [imp. & p. p. {Trolled}; p. pr. & vb. n.
   {Trolling}.] [OE. trollen to roll, F. tr[^o]ler, Of. troller
   to drag about, to ramble; probably of Teutonic origin; cf. G.
   trollen to roll, ramble, sich trollen to be gone; or perhaps
   for trotler, fr. F. trotter to trot (cf. {Trot}.). Cf.
   {Trawl}.]
   1. To move circularly or volubly; to roll; to turn.

            To dress and troll the tongue, and roll the eye.
                                                  --Milton.

   2. To send about; to circulate, as a vessel in drinking.

            Then doth she troll to the bowl.      --Gammer
                                                  Gurton's
                                                  Needle.

            Troll the brown bowl.                 --Sir W.
                                                  Scott.

   3. To sing the parts of in succession, as of a round, a
      catch, and the like; also, to sing loudly or freely.

            Will you troll the catch ?            --Shak.

            His sonnets charmed the attentive crowd, By
            wide-mouthed mortaltrolled aloud.     --Hudibras.

   4. To angle for with a trolling line, or with a book drawn
      along the surface of the water; hence, to allure.

   5. To fish in; to seek to catch fish from.

            With patient angle trolls the finny deep.
                                                  --Goldsmith.

Troll \Troll\, n.
   1. The act of moving round; routine; repetition. --Burke.

   2. A song the parts of which are sung in succession; a catch;
      a round.

            Thence the catch and troll, while ``Laughter,
            holding both his sides,'' sheds tears to song and
            ballad pathetic on the woes of married life. --Prof.
                                                  Wilson.

   3. A trolley.

   {Troll plate} (Mach.), a rotative disk with spiral ribs or
      grooves, by which several pieces, as the jaws of a chuck,
      can be brought together or spread radially.

Source : WordNet®

troll
     n 1: (Scandanavian folklore) a supernatural creature (either a
          dwarf or a giant) that is supposed to live in caves or
          in the mountains
     2: a partsong in which voices follow each other; one voice
        starts and others join in one after another until all are
        singing different parts of the song at the same time;
        "they enjoyed singing rounds" [syn: {round}]
     3: a fisherman's lure that is used in trolling; "he used a
        spinner as his troll"
     4: angling by drawing a baited line through the water [syn: {trolling}]

troll
     v 1: circulate, move around
     2: cause to move round and round; "The child trolled her hoop"
     3: sing the parts of (a round) in succession
     4: angle with a hook and line drawn through the water
     5: sing loudly and without inhibition
     6: praise or celebrate in song; "All tongues shall troll you"
     7: speak or recite rapidly or in a rolling voice

Source : Free On-Line Dictionary of Computing

TROLL
     
        An {array} language for {continuous simulation}, econometric
        modelling or statistical analysis.
     
        ["TROLL Reference Manual", D0062, Info Proc Services, MIT
        (1973-76)].

troll
     
        An {electronic mail} message, {Usenet} posting or other
        (electronic) communication which is intentionally incorrect,
        but not overtly controversial (compare {flame bait}), or the
        act of sending such a message.  Trolling aims to elicit an
        emotional reaction from those with a hair-trigger on the reply
        key.  A really subtle troll makes some people lose their
        minds.
     
        (1994-10-17)