/ Dictionary / Index A active duty: Meaning and Definition of Find definitions for: ac'tive du'ty Pronunciation: [key] — Mil. Mil. the status of full-time service:Also called on active duty. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. active active hydrogen Related Content Daily Word Quiz: jaundice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language