/ Dictionary / Index F first sergeant: Meaning and Definition of Find definitions for: first' ser'geant Pronunciation: [key] — U.S. Army. U.S. Army. the senior noncommissioned officer of a company, squadron, etc., responsible for personnel and administration. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. first run First State Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language