/ Dictionary / Index P prolusory: Meaning and Definition of Find definitions for: pro•lu•so•ry Pronunciation: (prō-l'su-rē, -zu-), [key] — adj. serving for prolusion. of the nature of a prolusion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: prolusory (Thesaurus) prolusion prom Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language