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WordReference Random House Unabridged Dictionary of American English © 2024lu•mi•nos•i•ty (lo̅o̅′mə nos′i tē),USA pronunciation n., pl. -ties. - luminance (def. 2).
- the quality of being intellectually brilliant, enlightened, inspired, etc.:The luminosity of his poetry is unequaled.
- something luminous.
- Astronomythe brightness of a star in comparison with that of the sun: the luminosity of Sirius expressed as 23 indicates an intrinsic brightness 23 times as great as that of the sun.
- OpticsAlso called luminos′ity fac′tor. the brightness of a light source of a certain wavelength as it appears to the eye, measured as the ratio of luminous flux to radiant flux at that wavelength.
- Latin lūminōs(us) luminous + -ity
- 1625–35
Collins Concise English Dictionary © HarperCollins Publishers:: luminosity /ˌluːmɪˈnɒsɪtɪ/ n ( pl -ties)- the condition of being luminous
- something that is luminous
- a measure of the radiant power emitted by a star
- the attribute of an object or colour enabling the extent to which an object emits light to be observed
Former name: brightness
See also colour
lu•mi•nous /ˈlumənəs/USA pronunciation adj. - radiating or reflecting light; shining;
bright:luminous eyes. - clear;
enlightening:a luminous explanation.
lu•mi•nos•i•ty /ˌluməˈnɑsɪti/USA pronunciation n. [uncountable] lu•mi•nous•ly, adv. WordReference Random House Unabridged Dictionary of American English © 2024lu•mi•nous (lo̅o̅′mə nəs),USA pronunciation adj. - 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.
- Latin lūminōsus. See lumen, -ous
- late Middle English 1400–50
- 1.See corresponding entry in Unabridged lucid, radiant, resplendent, brilliant.
- 3.See corresponding entry in Unabridged bright, intelligent.
- 4.See corresponding entry in Unabridged understandable, perspicuous, lucid.
- 1, 2.See corresponding entry in Unabridged dark.
- 3.See corresponding entry in Unabridged stupid.
- 4.See corresponding entry in Unabridged obscure.
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