Meaning of propylaeum

prop•y•lae•um

Pronunciation: (prop"u-lē'um), [key]
— pl. -lae•a
  1. 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.