The rapture is an eschatological (end times) event whereupon the return of Christ the true believers who are "alive and remain shall be caught up together with them [those who already died as Christians] in the clouds to meet the Lord in the air . . . " (1 Thess. 4:17). This is the time of the resurrection where the Christian receives his resurrected body. First to receive their new bodies are those who have died as Christians and then "those who are alive and remain."
There is much debate over the time of the rapture. Does it occur at the beginning, in the middle, or at the end of the tribulation period? (See Tribulation.)