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.
GRE Format. The GRE format will be slightly different depending on whether you complete it on a computer or by paper. The computer-based GRE takes up to three hoursâor more if an unscored âresearchâ section is included at the end. The paper-based test can last nearly four hours.