Breadcrumb Home > Dictionary > Index F F.I.O.: Meaning and Definition of Find definitions for: F.I.O. Pronunciation: [key] free in and out: a term of contract in which a ship charterer pays for loading and unloading. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fin whale Fiona ✖ Related Content Daily Word Quiz: triumphalism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language