a. [ Pref. im- not + perishable: cf. F. impérissable. ] Not perishable; not subject to decay; indestructible; enduring permanently; as, an imperishable monument; imperishable renown. -- Im*per"ish*a*ble*ness, n. -- Im*per"ish*a*bly, adv. [ 1913 Webster ]