1. (

• wallflower ,

) any of numerous plants of the genus Erysimum having fragrant yellow or orange or brownish flowers ;

2. (

• wallflower ,
• Cheiranthus_cheiri ,
• Erysimum_cheiri

) 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 ;

3. (

• wallflower

) remains on sidelines at social event ;