/ Dictionary / Index P propylon: Meaning and Definition of Find definitions for: prop•y•lon Pronunciation: (prop'u-lon"), [key] — n. propylaeum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. propylite propylphenyl acetate Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language