1. people who remain on the sidelines at social events, especially dances, typically because they are shy or not asked to participate
Usage: informal
2. fragrant flowers that grow on walls or in gardens, typically blooming in spring
Usage: botanical

Examples

• The wallflowers stood quietly by the refreshment table during the school dance.
• She used to be one of the wallflowers until she gained confidence in college.
• The garden was filled with colorful wallflowers blooming against the stone wall.
• Yellow wallflowers added a bright touch to the cottage garden.
• He encouraged the wallflowers to join the group activities.
• The wallflowers released their sweet fragrance in the evening air.