The Collaborative International Dictionary of English v.0.48:

Gewgaw \Gew"gaw\, n. [OE. gigawe, gugawe, gewgaude, prob. the
   same word as OE. givegove gewgaw, apparently a reduplicated
   form fr. AS. gifan to give; cf. also F. joujou plaything, and
   E. gaud, n. See Give, and cf. Giffgaff.]
   A showy trifle; a toy; a splendid plaything; a pretty but
   worthless bauble.

   Syn: knicknack; bauble; tschotschke.
        [1913 Webster]

              A heavy gewgaw called a crown.      --Dryden.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Gewgaw \Gew"gaw\, a.
   Showy; unreal; pretentious.
   [1913 Webster]

         Seeing his gewgaw castle shine.          --Tennyson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

gewgaw
    n 1: cheap showy jewelry or ornament on clothing [syn: bangle,
         bauble, gaud, gewgaw, novelty, fallal, trinket]