Definition of "lilac"

lilac

/ˈlaɪlək/

noun
plural lilacs
1. A large shrub of the genus Syringa, especially Syringa vulgaris, bearing white, pale-pink, or purple flowers.
  Quotations
  Breezes blowing from beds of iris quickened her breath with their perfume; she saw the tufted lilacs sway in the wind, and the streamers of mauve-tinted wistaria swinging, all a-glisten with golden bees; she saw a crimson cardinal winging through the foliage, and amorous tanagers flashing like scarlet flames athwart the pines.
  1907 August, Robert W[illiam] Chambers, “Afterglow”, in The Younger Set, New York, N.Y.: D. Appleton & Company, page 168
2. A flower of the lilac shrub.
3. (color) A pale purple color, the color of some lilac flowers.
4. A cat having a lilac-colored (pale brown) coat.
adjective
comparative more lilac, superlative most lilac
1. Having a pale purple colour.
2. Of a cat or its fur: having a pale brown colour, lighter than chocolate.