Meaning of BRIGHTNESS in English

BRIGHTNESS

noun Date: before 12th century 1. the quality or state of being bright, luminance , the attribute of light-source colors by which emitted light is ordered continuously from light to dark in correlation with its intensity

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.