Prŏp'yl-læ'um, n.

n.; pl. PRŎP'YL-LÆ'A. [Lat., Gr. πρoπύλαιον, from πρό, before, and πύλη, a gate; Fr. propylée.] (Anc. Arch.) Any court or vestibule before a building, or before its principal parts; especially, the entrance to such court or vestibule. Gwilt.