/ Dictionary / Index S staff officer: Meaning and Definition of Find definitions for: staff' of"ficer Pronunciation: [key] — Mil. Mil. a commissioned officer who is a member of a staff. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. staff of Aesculapius staff of life Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language