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Program terms and definitions, with audio.

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Last Supper the meal Jesus shared with his disciples on the night before he died. At the Last Supper, Jesus gave himself in the Eucharist.
liturgy the public prayer of the Church. It includes the Sacraments and forms of daily prayer.
Liturgy of the Eucharist the second main part of the Mass that includes Holy Communion
Liturgy of the Word

the first main part of the Mass during which we hear God's Word proclaimed

Lord's Prayer

the prayer that Jesus taught his disciples to pray to God the Father