noun a lady at a ball, who, either from choice, or because not asked to dance, remains a spectator.
2. wallflower ·add. ·noun in australia, the desert poison bush (gastrolobium grandiflorum);
called also native wallflower.
3. wallflower ·noun 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.