Catastrophe definition, a sudden and widespread disaster: the catastrophe of war. See more.
1 Total Time: The computer-delivered GRE takes 3 hours and 45 minutes for the average student.  Experts recommend sitting for the GRE exam one year prior to entering graduate school. This allows for ample study time and the option to retake it if desired.
The computer-based test. Scores from the computer-based Graduate Record Examination (GRE) can be made available to both yourself and the graduate school(s) to which you are applying in 10 to 15 days, according to the GRE website. The turnaround is fast, when compared with the other option, the paper test.