lilac /ˈlaɪlək/noun 4adjective 2forms 3 noun4 •A large shrub of the genus Syringa, especially Syringa vulgaris, bearing white, pale-pink, or purple flowers. •A pale purple color, the color of some lilac flowers. •A flower of the lilac shrub. •A cat having a lilac-colored (pale brown) coat. adjective2 •Having a pale purple colour. •Of a cat or its fur: having a pale brown colour, lighter than chocolate. formslilacs · more lilac · most lilac