/ Dictionary / Index P propylaeum: Meaning and Definition of Find definitions for: prop•y•lae•um Pronunciation: (prop"u-lē'um), [key] — pl. -lae•a Often,a vestibule or entrance to a temple area or other enclosure, esp. when elaborate or of architectural importance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. propyl propyl alcohol Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language