The Collaborative International Dictionary of English v.0.48:

Appeal \Ap*peal"\, v. t. [imp. & p. p. Appealed; p. pr. & vb.
   n. Appealing.] [OE. appelen, apelen, to appeal, accuse, OF.
   appeler, fr. L. appellare to approach, address, invoke,
   summon, call, name; akin to appellere to drive to; ad +
   pellere to drive. See Pulse, and cf. Peal.]
   1. (Law)
      (a) To make application for the removal of (a cause) from
          an inferior to a superior judge or court for a
          rehearing or review on account of alleged injustice or
          illegality in the trial below. We say, the cause was
          appealed from an inferior court.
      (b) To charge with a crime; to accuse; to institute a
          private criminal prosecution against for some heinous
          crime; as, to appeal a person of felony.
          [1913 Webster]

   2. To summon; to challenge. [Archaic]
      [1913 Webster]

            Man to man will I appeal the Norman to the lists.
                                                  --Sir W.
                                                  Scott.
      [1913 Webster]

   3. To invoke. [Obs.] --Milton.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Appealing \Ap*peal"ing\, a.
   That appeals; imploring. -- Ap*peal"ing*ly, adv. --
   Ap*peal"ing*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

appealing
    adj 1: able to attract interest or draw favorable attention; "He
           added an appealing and memorable figure to popular
           American mythology"- Vincent Starrett; "an appealing
           sense of humor"; "the idea of having enough money to
           retire at fifty is very appealing" [ant: unappealing]
    2: (of characters in literature or drama) evoking empathic or
       sympathetic feelings; "the sympathetic characters in the
       play" [syn: sympathetic, appealing, likeable,
       likable] [ant: unappealing, unlikable, unlikeable,
       unsympathetic]

Moby Thesaurus II by Grady Ward, 1.0:

114 Moby Thesaurus words for "appealing":
   achingly sweet, adjuratory, agreeable, agreeable-sounding,
   alluring, appetizing, ariose, arioso, attracting, attractive,
   begging, beguiling, beseeching, bewitching, blandishing, cajoling,
   canorous, cantabile, captivating, catching, catchy, charismatic,
   charming, coaxing, come-hither, coquettish, delightful, dulcet,
   enchanting, engaging, enravishing, enthralling, enticing,
   entrancing, entreating, euphonic, euphonious, euphonous, exciting,
   exotic, exquisite, fascinating, fetching, fine-toned, flirtatious,
   glamorous, golden, golden-tongued, golden-voiced, heart-robbing,
   honeyed, hypnotic, imploring, interesting, intriguing, inviting,
   irresistible, lovely, luxurious, melic, mellifluent, mellifluous,
   mellisonant, mellow, melodic, melodious, mesmeric, mouth-watering,
   music-flowing, music-like, musical, piquant, pleading, pleasant,
   pleasant-sounding, precative, precatory, prepossessing,
   provocative, provoquant, ravishing, rich, seducing, seductive,
   sensuous, silver-toned, silver-tongued, silver-voiced, silvery,
   singable, siren, sirenic, songful, songlike, sonorous,
   spellbinding, spellful, sweet, sweet-flowing, sweet-sounding,
   taking, tantalizing, teasing, tempting, thrilling, tickling,
   titillating, titillative, tunable, tuneful, voluptuous, winning,
   winsome, witching