adj.

1. Emitting light, especially emitting self-generated light.
2. Full of light; illuminated. See synonyms at bright.
3. 1. Easily comprehended; clear: luminous prose.
   2. Enlightened and intelligent; inspiring: luminous ideas.

[Middle English, from Old French lumineux, from Latin lūminōsus, from lūmen, lūmin-, light.]

luminously lu'mi·nous·ly adv.
luminousness lu'mi·nous·ness n.

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adjective

Giving off or reflecting light readily or in large amounts: beamy, bright, brilliant, effulgent, incandescent, irradiant, lambent, lucent, lustrous, radiant, refulgent, shiny. See light/darkness.

adj

Definition: bright, glowing
Antonyms: dark, dim, dull, gloomy

adj

Definition: obvious, understandable
Antonyms: obscure, unclear, unintelligible, vague

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IN BRIEF: Giving off light.

The diamond was so big and well cut that it seemed to be luminous.

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Dansk (Danish)
adj. - lysende, selvlysende, lysstærk, strålende, klart oplyst, klar

Nederlands (Dutch)
lumineus, lichtgevend, schitterend, stralend

Français (French)
adj. - lumineux, brillant

Deutsch (German)
adj. - Leucht-, leuchtend, brillant

Ελληνική (Greek)
adj. - φωτεινός, φωτερός, φωτοβόλος, (μτφ.) διαυγής, σαφής

Italiano (Italian)
luminoso

Português (Portuguese)
adj. - luminoso

Русский (Russian)
светящийся, световой, блестящий, ясный

Español (Spanish)
adj. - luminoso, brillante

Svenska (Swedish)
adj. - lysande, självlysande, strålande, festligt upplyst, (bildl.) klar, redig, tydlig, åskådlig

中文（简体） (Chinese (Simplified))
发光的, 明亮的

中文（繁體） (Chinese (Traditional))
adj. - 發光的, 明亮的

한국어 (Korean)
adj. - 빛을 내는 , 어둠에서 빛나는, 총명한, 조명된

日本語 (Japanese)
adj. - 光を発する, 光る, 明るい, 明瞭な

العربيه (Arabic)
‏(صفه) منير, مضئ, مضاء أو حسن الإضاءة, مستنير, ذكي, واضح يسهل فهمه‏

עברית (Hebrew)
adj. - ‮זוהר, מקרין, זורח, ברור, מבהיק‬

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Lenox Luminous Garden Votives	watches with luminous hands and numbers
pulsar luminous silver watch