What is the "Rapture"?

Rapture Verses
1 Corinthians 15:51-52
Behold, I show you a mystery; We shall not all sleep, but we shall all be changed, In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed.
1 Thessalonians 4:13-17
But we do not want you to be uninformed, brethren, about those who are asleep, so that you will not grieve as do the rest who have no hope. For if we believe that Jesus died and rose again, even so God will bring with Him those who have fallen asleep in Jesus. For this we say to you by the word of the Lord, that we who are alive and remain until the coming of the Lord, will not precede those who have fallen asleep. For the Lord Himself will descend from heaven with a shout, with the voice of the archangel and with the trumpet of God, and the dead in Christ will rise first.Then we who are alive and remain will be caught up together with them in the clouds to meet the Lord in the air, and so we shall always be with the Lord.
1 Thessalonians 5:9
For God hath not appointed us to wrath, but to obtain salvation by our Lord Jesus Christ
Revelation 3:10
"Because you have kept my command to persevere, I also will keep you from the hour of trial which shall come upon the whole world to test those who dwell on the earth."
1 Thessalonians 1:9-10
For they themselves report about us what kind of a reception we had with you, and how you turned to God from idols to serve a living and true God, and to wait for His Son from heaven, whom He raised from the dead, that is Jesus, who rescues us from the wrath to come.
Romans 5:9
"Much more then, having now been justified by His blood, we shall be saved from the wrath of God through Him."
Luke 21:34-36
"Be on guard, that your heart may not be weighted down with dissipation and drunkenness and the worries of life, and that day come on you suddenly like a trap; for it will come upon the face of the earth. But keep on the alert at all times, praying in order that you may have strength to escape all these things that are about to take place, and to stand before the Son of Man."
John 14:1-3
I Am the Way, and the Truth, and the Life, "Let not your hearts be troubled. Believe in God; believe also in me. In my Father’s house are many rooms. If it were not so, would I have told you that I go to prepare a place for you? And if I go and prepare a place for you, I will come again and will take you to myself, that where I am you may be also."