/ Dictionary / Index F functional shift: Meaning and Definition of Find definitions for: func'tional shift' Pronunciation: [key] a change in the grammatical function of a word, as in the use of the noun input as a verb or the noun fun as an adjective. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. functional sentence perspective functionary Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language