The Collaborative International Dictionary of English v.0.48:

Tease \Tease\ (t[=e]z), v. t. [imp. & p. p. Teased (t[=e]zd);
   p. pr. & vb. n. Teasing.] [AS. t?san to pluck, tease; akin
   to OD. teesen, MHG. zeisen, Dan. t[ae]se, t[ae]sse. [root]58.
   Cf. Touse.]
   1. To comb or card, as wool or flax. "Teasing matted wool."
      --Wordsworth.
      [1913 Webster]

   2. To stratch, as cloth, for the purpose of raising a nap;
      teasel.
      [1913 Webster]

   3. (Anat.) To tear or separate into minute shreds, as with
      needles or similar instruments.
      [1913 Webster]

   4. To vex with importunity or impertinence; to harass, annoy,
      disturb, or irritate by petty requests, or by jests and
      raillery; to plague. --Cowper.
      [1913 Webster]

            He . . . suffered them to tease him into acts
            directly opposed to his strongest inclinations.
                                                  --Macaulay.
      [1913 Webster]

   Syn: To vex; harass: annoy; disturb; irritate; plague;
        torment; mortify; tantalize; chagrin.

   Usage: Tease, Vex. To tease is literally to pull or
          scratch, and implies a prolonged annoyance in respect
          to little things, which is often more irritating, and
          harder to bear, than severe pain. Vex meant originally
          to seize and bear away hither and thither, and hence,
          to disturb; as, to vex the ocean with storms. This
          sense of the term now rarely occurs; but vex is still
          a stronger word than tease, denoting the disturbance
          or anger created by minor provocations, losses,
          disappointments, etc. We are teased by the buzzing of
          a fly in our eyes; we are vexed by the carelessness or
          stupidity of our servants.
          [1913 Webster]

                Not by the force of carnal reason,
                But indefatigable teasing.        --Hudibras.
          [1913 Webster]

                In disappointments, where the affections have
                been strongly placed, and the expectations
                sanguine, particularly where the agency of
                others is concerned, sorrow may degenerate into
                vexation and chagrin.             --Cogan.
          [1913 Webster]

   Tease tenon (Joinery), a long tenon at the top of a post to
      receive two beams crossing each other one above the other.
      [1913 Webster]

WordNet (r) 3.0 (2006):

teasing
    adj 1: playfully vexing (especially by ridicule); "his face wore
           a somewhat quizzical almost impertinent air"- Lawrence
           Durrell [syn: mocking, teasing, quizzical]
    2: arousing sexual desire without intending to satisfy it; "her
       lazy teasing smile"
    3: causing irritation or annoyance; "tapping an annoying rhythm
       on his glass with his fork"; "aircraft noise is particularly
       bothersome near the airport"; "found it galling to have to
       ask permission"; "an irritating delay"; "nettlesome
       paperwork"; "a pesky mosquito"; "swarms of pestering gnats";
       "a plaguey newfangled safety catch"; "a teasing and
       persistent thought annoyed him"; "a vexatious child"; "it is
       vexing to have to admit you are wrong" [syn: annoying,
       bothersome, galling, irritating, nettlesome, pesky,
       pestering, pestiferous, plaguy, plaguey, teasing,
       vexatious, vexing]
    n 1: the act of harassing someone playfully or maliciously
         (especially by ridicule); provoking someone with persistent
         annoyances; "he ignored their teases"; "his ribbing was
         gentle but persistent" [syn: tease, teasing, ribbing,
         tantalization]
    2: playful vexation; "the parody was just a form of teasing"
    3: the act of removing tangles from you hair with a comb [syn:
       comb-out, teasing]

Moby Thesaurus II by Grady Ward, 1.0:

147 Moby Thesaurus words for "teasing":
   aggravating, alluring, annoying, appealing, appetizing, attractive,
   bantering, beguiling, bewitching, blandishing, blandishment,
   booing, bothering, bothersome, buttonholing, cajolement, cajolery,
   cajoling, captivating, catcalling, catching, chaffing, charismatic,
   charming, coaxing, come-hither, coquettish, demanding, derisive,
   derisory, disappointing, disturbing, dunning, enchanting, engaging,
   enravishing, enthralling, enticing, entrancing, exasperating,
   exciting, exotic, falling short, fascinating, fetching, fleering,
   flippant, flirtatious, fooling, galling, glamorous, grinning,
   harassing, hazing, hissing, hooting, hypnotic, importunate,
   importunateness, importune, importunity, insistent, interesting,
   intriguing, inviting, irking, irksome, irresistible, irritating,
   jeering, jesting, joking, jollying, joshing, kidding, leering,
   mesmeric, mocking, mouth-watering, nagging, panning, pesky,
   pestering, pestiferous, pestilent, pestilential, piquant,
   plaguesome, plaguey, plaguing, plying, prepossessing, pressing,
   pressure, provocative, provoking, provoquant, quizzical, ragging,
   railing, rallying, ravishing, razzing, ribbing, ridiculing,
   roasting, scoffing, second best, seducing, seductive, siren,
   sirenic, smart, smart-alecky, smart-ass, smirking, sneering,
   snickering, sniggering, snorting, spellbinding, spellful, taking,
   tantalizing, taunting, tempting, tickling, tiresome, titillating,
   titillative, tormenting, troublesome, troubling, twitting,
   unsatisfactory, urgency, urgent, urging, vexatious, vexing,
   wearisome, wheedling, winning, winsome, witching, worrisome,
   worrying