continuing or enduring a long time; permanent; durable

a lasting friendship.

a strong, durable, closely woven fabric for shoe uppers, coverings on buttons, etc.

Archaic . the quality of surviving or continuing and maintaining strength, effectiveness, etc.

adjective

ceasing , ending , ephemeral , fleeting , passing , short-lived , temporary , transient , fugitive , impermanent , transitory

adjective

abiding , constant , continual , continuing , deep-rooted , durable , endless , eternal , everlasting , forever , incessant , indelible , indissoluble , inexhaustible , inexpungible , in for the long haul , lifelong , longstanding , long-term , old , perdurable , perennial , permanent , perpetual , persisting , stable , till the cows come home , unceasing , undying , unremitting , enduring , long-lasting , long-lived , long-standing , persistent , aeonian , boundless , chronic , classical , diuturnal , immortal , imperishable , in perpetuity , interminable , perseverant , pertinacious , protracted , sturdy , unending