uninterrupted in time and indefinitely long continuing - the ceaseless thunder of surf - in constant pain - night and day we live with the incessant noise of the city - the never-ending search for happiness - the perpetual struggle to maintain standards in a democracy - man's unceasing warfare with drought and isolation - unremitting demands of hunger • Syn: ceaseless, constant, never-ending, perpetual, unceasing, unremitting • Similar to: continuous, uninterrupted • Derivationally related forms: perpetuity (for: perpetual), incessantness, incessancy, ceaselessness (for: ceaseless)