1) the paschal sacrifice (which was accustomed to be offered for
    the people's deliverance of old from Egypt)
 2) the paschal lamb, i.e. the lamb the Israelites were accustomed to
    slay and eat on the fourteenth day of the month of Nisan (the
    first month of their year) in memory of the day on which their
    fathers, preparing to depart from Egypt, were bidden by God to
    slay and eat a lamb, and to sprinkle their door posts with its
    blood, that the destroying angel, seeing the blood, might pass
    over their dwellings; Christ crucified is likened to the slain
    paschal lamb
 3) the paschal supper
 4) the paschal feast, the feast of the Passover, extending from the
    14th to the 20th day of the month Nisan