The Collaborative International Dictionary of English v.0.48:

Exotic \Ex*ot"ic\, a. [L. exoticus, Gr. ? fr. 'e`xw outside: cf.
   F. exotique. See Exoteric.]
   Introduced from a foreign country; not native; extraneous;
   foreign; as, an exotic plant; an exotic term or word.
   [1913 Webster]

         Nothing was so splendid and exotic as the ambassador.
                                                  --Evelyn.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Exotic \Ex*ot"ic\, n.
   Anything of foreign origin; something not of native growth,
   as a plant, a word, a custom.
   [1913 Webster]

         Plants that are unknown to Italy, and such as the
         gardeners call exotics.                  --Addison.
   [1913 Webster]

WordNet (r) 3.0 (2006):

exotic
    adj 1: being or from or characteristic of another place or part
           of the world; "alien customs"; "exotic plants in a
           greenhouse"; "exotic cuisine" [syn: alien, exotic]
    2: strikingly strange or unusual; "an exotic hair style";
       "protons, neutrons, electrons and all their exotic variants";
       "the exotic landscape of a dead planet"

Moby Thesaurus II by Grady Ward, 1.0:

145 Moby Thesaurus words for "exotic":
   alien, alluring, apart, appealing, appetizing, asunder,
   at a distance, attractive, away, barbarian, barbaric, barbarous,
   beguiling, belly, bewitching, bizarre, blandishing, bottomless,
   bright, bright-hued, brilliant, burning, cajoling, captivating,
   catching, charismatic, charming, coaxing, colorful, colory,
   come-hither, coquettish, crazy, deep-colored, detached, different,
   disconnected, discrete, disjunct, disrelated, dissociated, distal,
   distant, enchanting, engaging, enravishing, enthralling, enticing,
   entrancing, exciting, exterior, external, extraneous,
   extraordinary, extraterrestrial, extrinsic, far, far off, faraway,
   fascinating, fetching, flirtatious, foreign, foreign-born, gay,
   gay-colored, glamorous, go-go, gorgeous, high-colored, hypnotic,
   imported, incommensurable, incomparable, independent, insular,
   intense, interesting, intriguing, intrusive, inviting, irrelative,
   irresistible, isolated, long-distance, long-range, mesmeric,
   mouth-watering, mysterious, naturalized, nude, odd, other, outland,
   outlandish, outside, peculiar, piquant, prepossessing, provocative,
   provoquant, ravishing, remarkable, remote, removed, rich,
   rich-colored, romanesque, romantic, seducing, seductive, segregate,
   separate, separated, singular, siren, sirenic, spellbinding,
   spellful, strange, striptease, taking, tantalizing, teasing,
   tempting, tickling, titillating, titillative, topless, ulterior,
   unaffiliated, unallied, unassociated, unconnected, unearthly,
   unfamiliar, unique, unrelatable, unrelated, unusual, vivid, weird,
   winning, winsome, witching