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 GRE is offered at testing centers almost every day. Call your local center for details and to book your test. While in theory you could sign up for the GRE with only two days' notice, don't depend upon this luxury. Call at least one month prior to your desired test date.