Definition of "wallflower" in English

noun

1. Any of several short-lived herbs or shrubs of the Erysimum genus with bright yellow to red flowers.

2. Gastrolobium grandiflorum, a poisonous bushy shrub, endemic to Australia.

3. A person who does not dance at a party, due to shyness or unpopularity; by extension, anyone who is left on the sidelines while an activity takes place.

4. (informal) Any person who is socially awkward, shy, or reserved.

verb

1. (intransitive) To stand shyly apart from a dance, waiting to be asked to join in.