The Collaborative International Dictionary of English v.0.48:

Coquette \Co*quette"\, n. [F., fr. coquet, coquette, coquettish,
   orig., cocklike, strutting like a cock, fr. coq a cock. Cf.
   Cock, Cocket, Cocky, Cockade.]
   1. A vain, trifling woman, who endeavors to attract
      admiration from a desire to gratify vanity; a flirt; --
      formerly sometimes applied also to men.
      [1913 Webster]

   2. (Zool.) A tropical humming bird of the genus Lophornis,
      with very elegant neck plumes. Several species are known.
      See Illustration under Spangle, v. t.
      [1913 Webster]

WordNet (r) 3.0 (2006):

coquette
    n 1: a seductive woman who uses her sex appeal to exploit men
         [syn: coquette, flirt, vamp, vamper, minx,
         tease, prickteaser]
    v 1: talk or behave amorously, without serious intentions; "The
         guys always try to chat up the new secretaries"; "My
         husband never flirts with other women" [syn: chat up,
         flirt, dally, butterfly, coquet, coquette,
         romance, philander, mash]

Moby Thesaurus II by Grady Ward, 1.0:

32 Moby Thesaurus words for "coquette":
   Circe, Don Juan, Lorelei, Parthenope, Siren, captive, catch,
   charmer, conquest, date, enchanter, enchantress, enticer,
   femme fatale, flirt, gold digger, honey, inveigler, seducer,
   seductress, siren, steady, strumpet, sweet patootie, sweetheart,
   sweetie, teaser, tempter, temptress, vamp, vampire, whore