/ Dictionary / Index F Fort Sill: Meaning and Definition of Find definitions for: Fort" Sill' Pronunciation: [key] a military reservation and U.S. Army training center in SW Oklahoma, N of Lawton; field artillery school. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Fort Sheridan Fort Smith Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language