Definition of "brightness" []

• The state or quality of being bright. (noun)
• The effect or sensation by means of which an observer is able to distinguish differences in luminance. (noun)
• 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). (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The brightness is as good as you get until you buy the top end Leupolds or German scopes."
• "In the dense mist, the Northern Star – in brightness,"
• "OLEDS are far superior in brightness and in their compact nature. the holy grail is to make them last more than a few thousand hours. there is also a lot of hope for carbon nanotubes. — dave kliman"