brightness - Definitions from Dictionary.com

5 results for: brightness

Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

bright·ness

Audio Help [brahyt-nis] Pronunciation Key

–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.

[Origin: bef. 950; ME brihtnes, OE beorhtnes. See bright, -ness

]

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

Encyclopædia Britannica, Inc.
brightness

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American Heritage Dictionary - Cite This Source - Share This

bright·ness Audio Help (brīt'nĭs) Pronunciation Key
n.

The state or quality of being bright.
The effect or sensation by means of which an observer is able to distinguish differences in luminance.
The dimension of a color that represents its similarity to one of a series of achromatic colors ranging from very dim (dark) to very bright (dazzling).

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

WordNet - Cite This Source - Share This

brightness
noun
1.	the location of a visual perception along a continuum from black to white [ant: dullness]
2.	intelligence as manifested in being quick and witty
3.	the quality of being luminous; emitting or reflecting light; "its luminosity is measured relative to that of our sun" [syn: luminosity]

Free On-line Dictionary of Computing - Cite This Source - Share This

brightness graphics
(Or "tone", "luminance", "value", "luminosity", "lightness") The coordinate in the HSB colour model that determines the total amount of light in the colour. Zero brightness is black and 100% is white, intermediate values are "light" or "dark" colours.
The other coordinates are hue and saturation.
(1999-07-05)