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.
Graduate Record Examinations. The Graduate Record Examinations (GRE) is a standardized test that is an admissions requirement for most Graduate Schools in the United States. The GRE is owned and administered by Educational Testing Service (ETS) who created it in 1949. According to ETS, the GRE aims to measure verbal reasoning, quantitative reasoning, analytical writing, and critical thinking skills that have been acquired over a long period of learning.