(jə-rāʹnē-əm) noun. 1. Any of various plants of the genus Geranium, having palmately divided leaves and pink or purplish flowers. Also called cranes bill. 2. Any of various plants of the genus Pelargonium, native chiefly to southern Africa and widely cultivated for their rounded, often variegated leaves and showy clusters of red, pink, or white flowers. Also called storks bill. 3. Color. A strong to vivid red, geranium.