Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
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noun
The quality of being luminous.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
The amount of light that passes through, is emitted, or is reflected from a particular area, and falls within a given solid angle.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
The luminous flux emitted in a given direction divided by the product of the projected area of the source element perpendicular to the direction and the solid angle containing that direction (i.e. luminous intensity divided by unit area), measured in stilbs or apostilbs.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Topics: engineering, natural-sciences, optics, physical-sciences, physics
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
the quality of being luminous; emitting or reflecting light
Definition source: Princeton WordNet 3.0
Synonyms: luminosity, brightness, brightness level, luminousness, light
Antonyms: none provided
Broader terms: physical property
Narrower terms: illuminance, illumination, incandescence, luminescence, glow
History
No etymology was provided for this word.
Across languages
6 source translations are retained for this English entry.
