Catechism of the Catholic Church §2859 — excerpt
By the second petition, the Church looks first to Christ's return and the final coming of the Reign of God. It also prays for the growth of the Kingdom of God in the "today" of our own lives.
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.