/ Dictionary / Index M millilux: Meaning and Definition of Find definitions for: mil•li•lux Pronunciation: (mil'u-luks"), [key] — n. Optics. a unit of illumination, equal to one thousandth of a lux. Abbr.: mlx Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. milliliter millime Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language