capacity /kəˈpæsɪti/noun 11adjective 1forms 1 noun11 •the largest amount that a box, a room or a machine is able to holdIt was hauling a capacity load.The orchestra played to a capacity crowd. •The ability to hold, receive, or absorb. •A measure of such ability; volume. •Capability; the ability to perform some task. •Mental ability; the power to learn. •The maximum that can be produced. •The maximum that can be produced on a machine or in a facility or group.Its capacity rating was 150 tons per hour, but its actual maximum capacity was 200 tons per hour. •A role; the position in which one functions. •The potential for growth and development. •Legal authority (to make an arrest for example). •Electrical capacitance. adjective1 •Filling the allotted space. formscapacities