geranium /dʒəˈɹeɪni.əm/noun 3adjective 1forms 4 noun3 •Any flowering plant of the genus Geranium, of family Geraniaceae. •Any flowering plant of the genus Pelargonium, of family Geraniaceae. •A bright red color tinted with orange, like that of a scarlet geranium (Pelargonium inquinans) . adjective1 •Of a bright red color tinted with orange, like that of a scarlet geranium (Pelargonium inquinans). formsgerania · geraniums · more geranium · most geranium