Main Entry: pro·py·lae·um

Pronunciation: \ˌprä-pə-ˈlē-əm, ˌprō-\

Function: noun

Inflected Form(s): plural -laea\-ˈlē-ə\

Etymology: Latin, from Greek propylaion, from pro- before + pylē gate — more at pro-

Date: circa 1706

: a vestibule or entrance of architectural importance before a building or enclosure —often used in plural