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[loo-muh-nuh s] /ˈlu mə nəs/

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.
radiating or reflecting light; shining; glowing: luminous colours
(not in technical use) exhibiting luminescence: luminous 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 measurements: luminous flux, luminous intensity Compare radiant
easily understood; lucid; clear
enlightening or wise

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.

luminous lu·mi·nous (lōō’mə-nəs)
Emitting light, especially emitting self-generated light.


Read Also:

  • Luminous-efficiency

    noun, Optics. 1. the perceived brightness of light as a ratio of the total luminous flux to total radiant flux of the source; a measure of brightness obtained by dividing the source’s luminous flux by the consumption of its energy. noun 1. the efficiency of polychromatic radiation in producing a visual sensation. It is the […]

  • Luminous-emittance

    noun, Optics. 1. luminous flux emitted per unit area.

  • Luminous-energy

    noun 1. 1 (def 2a). noun 1. energy emitted or propagated in the form of light; the product of a luminous flux and its duration, measured in lumen seconds Qv

  • Luminous exitance

    noun 1. the ability of a surface to emit light expressed as the luminous flux per unit area at a specified point on the surface Mv

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