/prop'euh lee"euhm/ , n. , pl. propylaea /-lee"euh/ .
Often, propylaea . a vestibule or entrance to a temple area or other enclosure, esp. when elaborate or of architectural importance.
Also, propylon .
[ 1700-10; propýlaion gateway, n. use of neut. of propýlaios before the gate, equiv. to pro- PRO- 2 + pýl ( e ) gate + -aios adj. suffix ]