Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “lilac”


noun [C or U] (PLANT)    /ˈlaɪ.lək/
a bush or small tree with sweet-smelling purple or white flowers : The lilacs are in bloom .Flowers and flowering plantsFlowers - general wordsBushes and shrubs
(Definition of lilac noun (PLANT) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of lilac

Definitions of “lilac” in other dictionaries

Word of the Day


a skilled and trained cook who works in a hotel or restaurant, especially the most important cook

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More