| 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. |
| 2. | A lady at a ball, who, either from choice, or because not asked to dance, remains a spectator. | |
| 3. | (Bot.) In Australia, the desert poison bush (Gastrolobium grandiflorum); - called also |
| Noun | 1. | wallflower - any of numerous plants of the genus Erysimum having fragrant yellow or orange or brownish flowers |
| 2. | wallflower - 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 Synonyms: Cheiranthus cheiri, Erysimum cheiri | |
| 3. | wallflower - remains on sidelines at social event |