Breadcrumb Home > Dictionary > Index F fath: Meaning and Definition of Find definitions for: fath Pronunciation: [key] fathom (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fat farm fathead ✖ Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language