The Collaborative International Dictionary of English v.0.48:

Intent \In*tent"\, a. [L. intentus, p. p. of intendere. See
   Intend, and cf. Intense.]
   [1913 Webster]
   1. Closely directed; strictly attentive; bent; -- said of the
      mind, thoughts, etc.; as, a mind intent on
      self-improvement.
      [1913 Webster]

   2. Having the mind closely directed to or bent on an object;
      sedulous; eager in pursuit of an object; -- formerly with
      to, but now with on; as, intent on business or pleasure.
      "Intent on mischief." --Milton.
      [1913 Webster]

            Be intent and solicitous to take up the meaning of
            the speaker.                          --I. Watts.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Intent \In*tent"\, n. [OE. entent, entente, attention, purpose,
   OF. entente, F. entente understanding, meaning; a participial
   noun, fr. F. & OF. entendre. See Intend.]
   The act of turning the mind toward an object; hence, a
   design; a purpose; intention; meaning; drift; aim.
   [1913 Webster]

         Be thy intents wicked or charitable.     --Shak.
   [1913 Webster]

         The principal intent of Scripture is to deliver the
         laws of duties supernatural.             --Hooker.
   [1913 Webster]

   To all intents and purposes, in all applications or senses;
      practically; really; virtually; in essence; essentially.
      "He was miserable to all intents and purpose."
      --L'Estrange.

   Syn: Design; purpose; intention; meaning; purport; view;
        drift; object; end; aim; plan.
        [1913 Webster]

WordNet (r) 3.0 (2006):

intent
    adj 1: giving or marked by complete attention to; "that
           engrossed look or rapt delight"; "then wrapped in
           dreams"; "so intent on this fantastic...narrative that
           she hardly stirred"- Walter de la Mare; "rapt with
           wonder"; "wrapped in thought" [syn: captive,
           absorbed, engrossed, enwrapped, intent,
           wrapped]
    n 1: an anticipated outcome that is intended or that guides your
         planned actions; "his intent was to provide a new
         translation"; "good intentions are not enough"; "it was
         created with the conscious aim of answering immediate
         needs"; "he made no secret of his designs" [syn: purpose,
         intent, intention, aim, design]
    2: the intended meaning of a communication [syn: intent,
       purport, spirit]

Moby Thesaurus II by Grady Ward, 1.0:

183 Moby Thesaurus words for "intent":
   abandoned, absorbed, absorbed in, acceptation, advertent, afire,
   agog, aim, alert, all ears, all eyes, ambition, animus, ardent,
   aspiration, assiduous, attending, attentive, avid, aware, bent,
   bent on, buried in, burning, careful, caught up in, committed,
   conation, concentrated, conscious, contemplating, contemplative,
   counsel, dead set on, decided, decided upon, decisive, dedicated,
   deep, desideration, desideratum, design, desire, determination,
   determined, determined upon, devoted, devoted to, devout, diligent,
   eager, earnest, effect, end, engaged, engrossed, engrossed in,
   enthusiastic, faithful, fervent, fervid, fiery, finical, finicking,
   finicky, firm, fixed, fixed purpose, fixed upon, flaming, function,
   goal, hearty, heated, heedful, hell-bent on, hot, hot-blooded,
   idea, immersed, immersed in, impassioned, import, in earnest,
   in effect, inclination, intending, intendment, intense, intent on,
   intent upon, intention, intentive, involved, keen, lost in, loyal,
   meaning, meditating, meditative, meticulous, mind, mindful,
   monomaniacal, monopolized, more or less, motive, nice, niggling,
   nisus, object, objective, observant, observing, obsessed, occupied,
   on fire, on the ball, on the job, open-eared, open-eyed,
   openmouthed, passionate, perfervid, plan, point, practically,
   preoccupied, project, proposal, prospectus, purport, purpose, rapt,
   red-hot, regardful, resolute, resolution, resolve, resolved,
   resolved upon, riveted, sake, sense, serious, set, set on, settled,
   settled upon, significance, significancy, signification, sincere,
   single-minded, sot on, spirited, steadfast, steady, striving,
   studious, study, studying, submerged in, swept up, taken up with,
   target, tendency, totally absorbed, understanding, vehement, view,
   virtually, volition, warm, watchful, watching, white-hot, will,
   wrapped, wrapped in, wrapped up, wrapped up in, zealous