Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

lux

play
noun, \ˈləks\

Definition of lux

plural lux or luxes

  1. :  a unit of illumination equal to the direct illumination on a surface that is everywhere one meter from a uniform point source of one candle intensity or equal to one lumen per square meter



Origin of lux

Latin, light — more at light


First Known Use: 1889

Rhymes with lux


Medical Dictionary

lux

play
noun \ˈləks\

Medical Definition of lux

plural lux or luxes

  1. :  a unit of illumination equal to the direct illumination on a surface that is everywhere one meter from a uniform point source of one candle intensity or equal to one lumen per square meter—called also meter-candle




Learn More about lux

  1. Medical Dictionary: Definition of "lux" Britannica.com: Encyclopedia article about "lux"


Seen and Heard

What made you want to look up lux? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a timid, meek, or unassertive person

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alt-5746713d76276

Which of these is a synonym of nonplus?

soothe disapprove perplex reduce
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ