What is the meaning of Lilac?

A large shrub of the genus Syringa, especially Syringa vulgaris, bearing white, pale-pink, or purple flowers.

A flower of the lilac shrub.

A pale purple color, the color of some lilac flowers.

A cat having a lilac-colored (pale brown) coat.

Having a pale purple colour.

Of a cat or its fur: having a pale brown colour, lighter than chocolate.

archaic form of lilas

Source: wiktionary.org