radiating or reflecting light; shining; bright.
lighted up or illuminated; well-lighted: the luminous ballroom.
brilliant intellectually; enlightened or enlightening, as a writer or a writer's works: a luminous concept; luminous prose.
clear; readily intelligible: a concise, luminous report.

Origin of luminous

First recorded in 1400–50; late Middle English word from Latin word lūminōsus. See lumen, -ous
Related formslu·mi·nous·ly, adverblu·mi·nous·ness, nounnon·lu·mi·nous, adjectivenon·lu·mi·nous·ly, adverbnon·lu·mi·nous·ness, nounself-lu·mi·nous, adjectivesem·i·lu·mi·nous, adjectivesem·i·lu·mi·nous·ly, adverbsem·i·lu·mi·nous·ness, nounun·lu·mi·nous, adjectiveun·lu·mi·nous·ly, adverbun·lu·mi·nous·ness, noun

Synonyms for luminous

Antonyms for luminous

1, 2. dark. 3. stupid. 4. obscure. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for luminous

Contemporary Examples of luminous

Historical Examples of luminous

British Dictionary definitions for luminous



radiating or reflecting light; shining; glowingluminous colours
(not in technical use) exhibiting luminescenceluminous 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 measurementsluminous flux; luminous intensity Compare radiant
easily understood; lucid; clear
enlightening or wise
Derived Formsluminously, adverbluminousness, noun

Word Origin for luminous

C15: from Latin lūminōsus full of light, from lūmen light
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for luminous

early 15c., "full of light," from Latin luminosus "shining, full of light," from lumen (genitive luminis) "light," related to lucere "to shine" (see light (n.)). Related: Luminously.

Online Etymology Dictionary, © 2010 Douglas Harper

luminous in Medicine




Emitting light, especially emitting self-generated light.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.