a test, especially one conducted in a laboratory, to determine how much pressure, tension, wear, or the like a given product or material can withstand.
Medicine/Medical. a test of cardiovascular health made by recording heart rate, blood pressure, electrocardiogram, and other parameters while a person undergoes physical exertion.
a simulation test to determine how a given institution, system, etc., would perform under greater than usual stresses or pressures: the government’s stress test for big banks;mandatory stress tests for nuclear plants;
a website stress test that simulates peak traffic.