strike zone
volume of space through which a pitch must pass in order to be called a strike, if the batter does not swing
en-GB/ˈstɹaɪk ˈzəʊn/
en-US/ˈstɹaɪk ˈzoʊn/
volume of space through which a pitch must pass in order to be called a strike, if the batter does not swing