Q. 1. What is meant by "parousia?"
A. 1. The Greek meaning of the word "parousia" is "presence." Its reference found in Matthew 24:3-4 has to do with the Second Coming of Christ at the end of time.
According to the Catholic Encyclopedia, "Besides the name Parusia (parousia), or Advent (1 Corinthians 15:23; 2 Thessalonians 2:19), the Second Coming is also called Epiphany, epiphaneia, or Appearance (2 Thessalonians 2:8; 1 Timothy 6:14; 2 Timothy 4:1; Titus 2:13), and Apocalypse (apokalypsis), or Revelation (2 Thessalonians 2:7; 1 Peter 4:13). The time of the Second Coming is spoken of as "that Day" (2 Timothy 4:8), "the day of the Lord" (1 Thessalonians 5:2), "the day of Christ" (Philemon 1:6), "the day of the Son of Man" (Luke 17:30), "the last day" (John 6:39-40)."
"The visible coming (parousia) of Christ in power and glory will be the signal for the rising of the dead. It is Catholic teaching that all the dead who are to be judged will rise, the wicked as well as the Just, and that they will rise with the bodies they had in this life."