1: any of several Old World perennial herbs (genus Cheir􀁣nthus) of the mustard family / a hardy erect herb (C. cheiri) or any of a related genus (Erysimum) of herbs widely cultivated for its showy fragrant 
2: a person who, from shyness or unpopularity, remains on the sidelines of a social activity (such as a dance)/ a shy or 
reserved person 
(Merriam-Webster Dictionary)