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 General Test is offered as a computer-based exam administered at Prometric testing centers. In the graduate school admissions process, the level of emphasis that is placed upon GRE scores varies widely between schools and between departments within schools.