/ Dictionary / Index D dux: Meaning and Definition of Find definitions for: dux Pronunciation: (duks, dooks), [key] — pl. du•ces dux•es the pupil who is academically first in a class or school. (in the later Roman Empire) a military chief commanding the troops in a frontier province. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. du Vigneaud Duxbury Related Content Daily Word Quiz: divulge Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language