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Synonyms

brightness

American  
[brahyt-nis] / ˈbraɪt nɪs /

noun

  1. the quality of being bright.

  2. 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.

ˈbrightness British  
/ ˈbraɪtnɪs /

noun

  1. the condition of being bright

  2. physics a former name for luminosity

  3. 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

Etymology

Origin of brightness

before 950; Middle English brihtnes, Old English beorhtnes. See bright, -ness

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.