Roman Catechism 7.5

Chapter 7 — Part I: The Creed — Article V: He Descended into Hell; the Third Day He Rose Again from the Dead

Section 5. Hell, then, here signifies those secret abodes in which are detained the souls that have not obtained the happiness of heaven. In this sense the word is frequently used in Scripture. Thus the Apostle says: At the name of Jesus every knee shall bow, of those that are in heaven, on earth, and in hell; and in the Acts of the Apostles St. Peter says that Christ the Lord is again risen, having loosed the sorrows of hell.