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.
In addition to the General Test, there are also six GRE Subject Tests testing knowledge in the specific areas of Biology; Chemistry; Literature in English; Mathematics; Physics; and Psychology. The length of each exam is 170 minutes.