The Collaborative International Dictionary of English v.0.48:

Gaudy \Gaud"y\, a. [Compar. Gaudier; superl. Gauidiest.]
   1. Ostentatiously fine; showy; gay, but tawdry or
      meretricious.
      [1913 Webster]

            Costly thy habit as thy purse can buy,
            But not expressed in fancy; rich, not gaudy. --Shak.
      [1913 Webster]

   2. Gay; merry; festal. --Tennyson.
      [1913 Webster]

            Let's have one other gaudy night.     --Shak.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Gaudy \Gaud"y\, n.; pl. Gaudies [See Gaud, n.]
   One of the large beads in the rosary at which the paternoster
   is recited. [Obs.] --Gower.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Gaudy \Gaud"y\, n.
   A feast or festival; -- called also gaud-day and gaudy
   day. [Oxford Univ.] --Conybeare.
   [1913 Webster]

WordNet (r) 3.0 (2006):

gaudy
    adj 1: tastelessly showy; "a flash car"; "a flashy ring";
           "garish colors"; "a gaudy costume"; "loud sport shirts";
           "a meretricious yet stylish book"; "tawdry ornaments"
           [syn: brassy, cheap, flash, flashy, garish,
           gaudy, gimcrack, loud, meretricious, tacky,
           tatty, tawdry, trashy]
    2: (used especially of clothes) marked by conspicuous display
       [syn: flashy, gaudy, jazzy, showy, sporty]
    n 1: (Britain) a celebratory reunion feast or entertainment held
         a college

Moby Thesaurus II by Grady Ward, 1.0:

127 Moby Thesaurus words for "gaudy":
   Gongoresque, Johnsonian, affected, bedizened, beggarly,
   beneath contempt, big-sounding, blatant, blinding, brazen,
   brazenfaced, brummagem, cheap, cheesy, chintzy, coarse, colorful,
   common, contemptible, convoluted, crass, crude, crummy,
   declamatory, despicable, earthy, elevated, euphuistic, extravagant,
   fake, flagrant, flamboyant, flaming, flaring, flashy, flaunting,
   florid, fulsome, garish, gimcrack, gimcracky, glaring, gorgeous,
   grandiloquent, grandiose, grandisonant, gross, high-flowing,
   high-flown, high-flying, high-sounding, highfalutin, honky-tonk,
   inkhorn, labyrinthine, lexiphanic, lofty, loud, lurid,
   magniloquent, mean, meretricious, miserable, obscene, obtrusive,
   orotund, ostentatious, overbright, overdone, overelaborate,
   overinvolved, overwrought, paltry, pathetic, pedantic, phony,
   pitiable, pitiful, pompous, poor, pretentious, raffish, raw,
   rhetorical, ribald, rough, rubbishy, rude, sad, screaming, scrubby,
   scruffy, scummy, scurvy, scuzzy, sensational, sensationalistic,
   sententious, shabby, sham, shameless, shoddy, showy, shrieking,
   sonorous, sorry, spectacular, stilted, tacky, tall, tasteless,
   tatty, tawdry, tinsel, tinselly, tortuous, trashy, trumpery,
   two-for-a-cent, two-for-a-penny, twopenny, twopenny-halfpenny,
   valueless, vile, vulgar, worthless, wretched