luminous
Americanadjective
-
radiating or reflecting light; shining; bright.
- Synonyms:
- brilliant, resplendent, radiant, lucid
- Antonyms:
- dark
-
lighted up or illuminated; well-lighted.
the luminous ballroom.
- Antonyms:
- dark
-
brilliant intellectually; enlightened or enlightening, as a writer or a writer's works.
a luminous concept; luminous prose.
- Synonyms:
- intelligent, bright
- Antonyms:
- stupid
-
clear; readily intelligible.
a concise, luminous report.
- Synonyms:
- lucid, perspicuous, understandable
- Antonyms:
- obscure
adjective
-
radiating or reflecting light; shining; glowing
luminous colours
-
(not in technical use) exhibiting luminescence
luminous paint
-
full of light; well-lit
-
(of a physical quantity in photometry) evaluated according to the visual sensation produced in an observer rather than by absolute energy measurements Compare radiant
luminous flux
luminous intensity
-
easily understood; lucid; clear
-
enlightening or wise
Other Word Forms
- luminously adverb
- luminousness noun
- nonluminous adjective
- nonluminously adverb
- nonluminousness noun
- self-luminous adjective
- semiluminous adjective
- semiluminously adverb
- semiluminousness noun
- unluminous adjective
- unluminously adverb
- unluminousness noun
Etymology
Origin of luminous
First recorded in 1400–50; late Middle English word from Latin word lūminōsus. See lumen, -ous
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
"Black holes are known to 'eat' a lot of stuff, but during the active eating process and in their luminous quasar form, they also emit very strong radiation," said Zhu.
From Science Daily • Mar. 30, 2026
Rarely used in jewelry, the dark navy of sodalite adds an unexpected layer of depth to Color Blossom’s existing luminous gemstone lineup.
From Los Angeles Times • Mar. 3, 2026
The eyes, large and luminous, always stand out.
From The Wall Street Journal • Feb. 20, 2026
A luminous outline of Nicolás Maduro and his wife Cilia Flores loomed over Caracas against the night sky in January.
From BBC • Feb. 17, 2026
It was then that the Moon Witch set her luminous eyes on the children in front of her.
From "The Way to Rio Luna" by Zoraida Cordova
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
