1. permanent, unending. Eternal, endless, everlasting, perpetual imply lasting or going on without ceasing. That which is eternal is, by its nature, without beginning or end: God, the eternal Father. That which is endless never stops but goes on continuously as if in a circle: an endless succession of years. That which is everlasting will endure through all future time: a promise of everlasting life. Perpeptual implies continuous renewal as far into the future as one can foresee: perpetual strife between nations. 3. timeless, immortal, deathless, undying, imperishable, indestructible.