PJ Gen18:8 :וסדר קדמיהון כאורח הילכת בריית עלמא‏ : he arranged it before them in the customary manner of the world's creation
See the entire entry for hilkā, hilkəṯā n.f. accepted legal decision; custom

PJ Gen18:8 :ודמי ליה כאילו אכלין‏ : it seemed to him as if they were eating
See the entire entry for kˀylw conj. as if