Definition of luminous
1a
: 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
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Merriam-Webster unabridged
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Time Traveler for luminous
The first known use of luminous was in the 15th century
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