Simple Definition of luminous
: producing or seeming to produce light
: filled with light : brightly lit
: very bright in color
Full Definition of luminous
Examples of luminous in a sentence
I saw the cat's luminous eyes in my car's headlights.
a watch with a luminous dial
The room was luminous with sunlight.
Did You Know?
Luminous, like its synonyms radiant, shining, glowing, and lustrous, is generally a positive adjective, especially when it describes something that doesn't literally glow, such as a face, a performance, or a poem. Luminous signs depend on a gas such as neon, krypton, argon, xenon, or radon—and you can use luminous (DayGlo) paint to make your own signs. New technologies have now given us luminous fabrics, which are being used to produce striking or creepy effects in clothing, upholstery, and interior surfaces.
Origin and Etymology of luminous
Middle English, from Latin luminosus, from lumin-, lumen
First Known Use: 15th century
Synonym Discussion of luminous
LUMINOUS Defined for Kids
Definition of luminous for Students
: giving off light <The dial of the clock was luminous and it shed a very soft green light. — George Selden, The Cricket in Times Square>
Medical Definition of luminous
1: emitting or reflecting usually steady, suffused, or glowing light
2: of or relating to light or to luminous flux
Seen and Heard
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