Passover: The feast when the Jewish people celebrate their freedom from slavery in Egypt.
Last Supper: The Passover meal at which Jesus gave us the Eucharist.
Eucharist: The sacrament of Jesus Body and Blood. The word "eucharist" means to give thanks.
Mass: The celebration of the Eucharist.
Sacrifice: A gift offered to God by the priest in the name of the people. Jesus' gift was His life.
Assembly: The people gathered to worship in the name of Jesus Christ.
Holy Days of Obligation: Special feasts on which we are required to attend mass.