Just as God's will is creation and is called "the world," so his intention is the salvation of men, and it is called "the Church." 155
Catechism number 777
The word "Church" means "convocation." It designates the assembly of those whom God's Word "convokes," i.e., gathers together to form the People of God, and who themselves, nourished with the Body of Christ, become the Body of Christ.