The Great Tribulation is a period of time that would occur in the time of the end (or end times).  In the futurist view of Christianity, posttribulationists see the Tribulation as a period of time (likely seven years) where everyone will experience worldwide hardships, disasters, famine, war, pain, and suffering, which will wipe out more than 75% of all life on the earth before the Second Coming takes place.  However, according to other interpretations, Christians will be taken bodily up to Heaven (the rapture) before (believed by pretribulationists) or possibly during (believed by midtribulationists) the Tribulation period.

Synonyms:
rapture, raptured