/ Dictionary / Index S serif: Meaning and Definition of Find definitions for: ser•if Pronunciation: (ser'if), [key] — n. Print. a smaller line used to finish off a main stroke of a letter, as at the top and bottom of M. See diag. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: serif (Thesaurus) series-wound serigraph Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language