hibiscus /hɪˈbɪskəs/ noun2 •A flowering plant of the genus Hibiscus, especially Hibiscus syriacus, found in tropical to temperate regions, of some species used for making infusions/tea.There were red hibiscus flowers splashed all over it, yellow dots quivering at the stamens. — 2020 •A cocktail made with champagne and cranberry juice. formshibisci · hibiscuses