[1] : The Collaborative International Dictionary of English v.0.48

wallflower \wall"flow`er\, n.
   1. bot. a perennial, cruciferous plant cheiranthus
      cheiri, with sweet-scented flowers varying in color from
      yellow to orange and deep red. in europe it very common on
      old walls.
      1913 webster

   note: the name is sometimes extended to other species of
         cheiranthus and of the related genus erysimum,
         especially the american western wallflower erysimum
         asperum, a biennial herb with orange-yellow flowers.
         1913 webster

   2. a lady at a ball, who, either from choice, or because not
      asked to dance, remains a spectator. colloq.
      1913 webster

   3. bot. in australia, the desert poison bush gastrolobium
      grandiflorum; -- called also native wallflower.
      webster 1913 suppl.
see also:
cheiranthus cheiri cheiranthus erysimum western wallflower erysimum asperum gastrolobium grandiflorum 
native wallflower 

[2] : WordNet (r) 2.0

wallflower
     n 1: any of numerous plants of the genus erysimum having fragrant
          yellow or orange or brownish flowers
     2: perennial of southern europe having clusters of fragrant
        flowers of all colors especially yellow and orange; often
        naturalized on old walls or cliffs; sometimes placed in
        genus erysimum syn: cheiranthus cheiri, erysimum
        cheiri
     3: remains on sidelines at social event
see also:
cheiranthus cheiri erysimum cheiri 

Wallflower >> W Words
Wallflower, definition of term: Wallflower
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