/ Dictionary / Index F functionable: Meaning and Definition of Find definitions for: func•tion•a•ble Pronunciation: (fungk'shu-nu-bul), [key] — adj. functional (def. 3). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. function functional Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language