I.a gateway, entrance; esp. (in plur.) of the celebrated entrance to the temple of Pallas in the citadel of Athens, the Propylœum: “Phalereus Demetrius Periclem vituperat, quod tantam pecuniam in praeclara illa propylaea conjecerit,” Cic. Off. 2, 17, 60: propylaea nobilia. id. Rep. 3, 32, 44.—In sing.: “cum Athenis propylaeon pingeret,” Plin. 35, 10, 36, § 101 (al. propylon); 36, 5, 3, § 10.
prŏpylaeum (-laeon ), or prŏpy-lon , i, n., = προπύλαιον,