The Collaborative International Dictionary of English v.0.48:

Torment \Tor"ment\, n. [OF. torment, F. tourment, fr. L.
   tormentum an engine for hurling missiles, an instrument of
   torture, a rack, torture, fr. torquere to turn, to twist,
   hurl. See Turture.]
   1. (Mil. Antiq.) An engine for casting stones. [Obs.] --Sir
      T. Elyot.
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   2. Extreme pain; anguish; torture; the utmost degree of
      misery, either of body or mind. --Chaucer.
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            The more I see
            Pleasures about me, so much more I feel
            Torment within me.                    --Milton.
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   3. That which gives pain, vexation, or misery.
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            They brought unto him all sick people that were
            taken with divers diseases and torments. --Matt. iv.
                                                  24.
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The Collaborative International Dictionary of English v.0.48:

Torment \Tor*ment"\, v. t. [imp. & p. p. tormented; p. pr. &
   vb. n. tormenting.] [OF. tormenter, F. tourmenter.]
   1. To put to extreme pain or anguish; to inflict excruciating
      misery upon, either of body or mind; to torture. " Art
      thou come hither to torment us before our time? " --Matt.
      viii. 29.
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   2. To pain; to distress; to afflict.
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            Lord, my servant lieth at home sick of the palsy,
            grievously tormented.                 --Matt. viii.
                                                  6.
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   3. To tease; to vex; to harass; as, to be tormented with
      importunities, or with petty annoyances. [Colloq.]
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   4. To put into great agitation. [R.] "[They], soaring on main
      wing, tormented all the air." --Milton.
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WordNet (r) 3.0 (2006):

torment
    n 1: unbearable physical pain [syn: torture, torment]
    2: extreme mental distress [syn: anguish, torment,
       torture]
    3: intense feelings of suffering; acute mental or physical pain;
       "an agony of doubt"; "the torments of the damned" [syn:
       agony, torment, torture]
    4: a feeling of intense annoyance caused by being tormented; "so
       great was his harassment that he wanted to destroy his
       tormentors" [syn: harassment, torment]
    5: a severe affliction [syn: curse, torment]
    6: the act of harassing someone [syn: badgering, worrying,
       torment, bedevilment]
    v 1: torment emotionally or mentally [syn: torment, torture,
         excruciate, rack]
    2: treat cruelly; "The children tormented the stuttering
       teacher" [syn: torment, rag, bedevil, crucify, dun,
       frustrate]
    3: subject to torture; "The sinners will be tormented in Hell,
       according to the Bible" [syn: torture, excruciate,
       torment]