/ Dictionary / Index S set function: Meaning and Definition of Find definitions for: set' func"tion Pronunciation: [key] — Math. Math. a function having a collection of sets as domain. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. se-tenant Seth Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language