/ Dictionary / Index P Prelog: Meaning and Definition of Find definitions for: Pre•log Pronunciation: (prel'ôg, -og), [key] born 1906, Swiss chemist, born in Yugoslavia: Nobel prize 1975. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. preliterate prelude Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language