brightness level brightness equation • brightness temperature · · · Info · Definitions · Synonyms · Characters · · brightness level · · Text Common · · Latin · · Scripts 16 · · Length 4 · · Syllables Definitions · · · (noun) the quality of being luminous; emitting or reflecting light. Synonyms: luminosity, brightness, brightness level, luminance, luminousness, light. Example: "Its luminosity is measured relative to that of our sun." · · Noun Definition 1 Synonyms · · · luminosity · · Synonym 1 brightness · · Synonym 2 luminance · · Synonym 3 luminousness · · Synonym 4 light · · Synonym 5 Characters · · space U+0020 b latin small letter b U+0062 e latin small letter e U+0065 g latin small letter g U+0067 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 v latin small letter v U+0076