luminous

play
adjective lu·mi·nous \ ˈlü-mə-nəs \

Definition of luminous

1 a :emitting or reflecting usually steady, suffused, or glowing light
  • luminous objects—the nebula. the stars, the planets
  • —Lincoln La Paz
b :of or relating to light or to luminous flux
2 :bathed in or exposed to steady light
  • luminous with sunlight
3 :clear, enlightening
  • a luminous explanation
4 :shining, illustrious
  • a luminous film star
  • a luminous performance

luminously

adverb

luminousness

noun

Examples of luminous in a Sentence

  1. I saw the cat's luminous eyes in my car's headlights.

  2. a watch with a luminous dial

  3. The room was luminous with sunlight.

Recent Examples of luminous from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'luminous.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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

Synonym Discussion of luminous

bright, brilliant, radiant, luminous, lustrous mean shining or glowing with light. bright implies emitting or reflecting a high degree of light. brilliant implies intense often sparkling brightness. radiant stresses the emission or seeming emission of rays of light. luminous implies emission of steady, suffused, glowing light by reflection or in surrounding darkness. lustrous stresses an even, rich light from a surface that reflects brightly without glittering.

LUMINOUS Defined for English Language Learners

luminous

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adjective

Definition of luminous for English Language Learners

  • : producing or seeming to produce light

  • : filled with light : brightly lit

  • : very bright in color


LUMINOUS Defined for Kids

luminous

play
adjective lu·mi·nous \ ˈlü-mə-nəs \

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

luminously

adverb

Medical Dictionary

luminous

play
adjective lu·mi·nous \ ˈlü-mə-nəs \

medical Definition of luminous

1 :emitting or reflecting usually steady, suffused, or glowing light
2 :of or relating to light or to luminous flux


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