/ Dictionary / Index F Fortin barometer: Meaning and Definition of Find definitions for: For'tin barom'eter Pronunciation: (fôr'tan Fr. fôr&sylptan'), [key] an adjustable cistern barometer, the most common of those employing mercury. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fortify Fort Irwin Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language