/ Dictionary / Index S sentential function: Meaning and Definition of Find definitions for: senten'tial func'tion Pronunciation: [key] — Logic. Logic. an expression that contains one or more variables and becomes meaningful when suitable constant terms are substituted for them. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sentential connective sententious Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language