The Collaborative International Dictionary of English v.0.48:

Discontinue \Dis`con*tin"ue\, v. t. [imp. & p. p.
   Discontinued; p. pr. & vb. n. Discontinuing.] [Cf. F.
   discontinuer.]
   To interrupt the continuance of; to intermit, as a practice
   or habit; to put an end to; to cause to cease; to cease
   using, to stop; to leave off.
   [1913 Webster]

         Set up their conventicles again, which had been
         discontinued.                            --Bp. Burnet.
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         I have discontinued school
         Above a twelvemonth.                     --Shak.
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         Taught the Greek tongue, discontinued before in these
         parts the space of seven hundred years.  --Daniel.
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         They modify and discriminate the voice, without
         appearing to discontinue it.             --Holder.
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The Collaborative International Dictionary of English v.0.48:

Discontinue \Dis`con*tin"ue\, v. i.
   1. To lose continuity or cohesion of parts; to be disrupted
      or broken off. --Bacon.
      [1913 Webster]

   2. To be separated or severed; to part.
      [1913 Webster]

            Thyself shalt discontinue from thine heritage.
                                                  --Jer. xvii.
                                                  4.
      [1913 Webster]

WordNet (r) 3.0 (2006):

discontinue
    v 1: put an end to a state or an activity; "Quit teasing your
         little brother" [syn: discontinue, stop, cease, give
         up, quit, lay off] [ant: bear on, carry on,
         continue, preserve, uphold]
    2: come to or be at an end; "the support from our sponsoring
       agency will discontinue after March 31" [ant: continue, go
       along, go on, keep, proceed]
    3: prevent completion; "stop the project"; "break off the
       negotiations" [syn: break, break off, discontinue,
       stop]

Moby Thesaurus II by Grady Ward, 1.0:

51 Moby Thesaurus words for "discontinue":
   abandon, abjure, abort, belay, break, break off, break the habit,
   cancel, cease, come off, cut it out, cut out, desist, disarrange,
   disjoin, disuse, drop, drop it, end, forswear, give, give over,
   give up, halt, have done with, hold, interrupt, kick, knock it off,
   lay off, leave off, let go, nol-pros, not pursue with,
   put behind one, quit, refrain, relinquish, renounce, resign, scrub,
   shake, stay, stop, surcease, suspend, swear off, take the pledge,
   terminate, throw off, waive