Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “luminous”


adjective uk   /ˈluː.mɪ.nəs/ us  
producing or reflecting bright light (especially in the dark): luminous clothingThe qualities of light
noun [U] uk   /ˌluː.mɪˈnɒs.ə.tɪ/ us    /-ˈnɑː.sə.t̬i/
adverb uk   /-li/ us  
The qualities of light
(Definition of luminous from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of luminous?
Add Cambridge dictionaries to your browser to your website

Definitions of “luminous” in other dictionaries

Word of the Day


like hops (= dried fruit used to make beer)

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