brightness

[ brahyt-nis ]
/ ˈbraɪt nɪs /

noun

the quality of being bright.
Optics. the luminance of a body, apart from its hue or saturation, that an observer uses to determine the comparative luminance of another body. Pure white has the maximum brightness, and pure black the minimum brightness.

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Origin of brightness

before 950; Middle English brihtnes,Old English beorhtnes.See bright, -ness
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for brightness

British Dictionary definitions for brightness

brightness
/ (ˈbraɪtnɪs) /

noun

the condition of being bright
physics a former name for luminosity (def. 4)
psychol the experienced intensity of light
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012