workout \ˈ ̷ ̷ˌ ̷ ̷\noun (-s) Etymology:work out 1.: a practice game, bout, or run : an exercise designed to test one's fitness or to increase one's fitness especially for athletic competition < daily workouts with barbells > 2.: a test or trial for determining ability or capacity or suitability < in the production of dangerous war materials … automation has had its most complete workout — Robert Bendiner >