inactiveness n 1: the state of being inactive [syn: {inaction}, {inactivity}] [ant: {action}, {action}, {action}] 2: a state of no activity [syn: {inaction}] 3: a disposition to remain inactive or inert; "he had to overcome his inertia and get back to work" [syn: {inactivity}, {inertia}] [ant: {activeness}]