Define eternal.

eternal-adjective

lasting or existing forever; without end or beginning.

"the secret of eternal youth"

synonyms:everlasting, never-ending, endless, without end, perpetual, undying, immortal, deathless, indestructible, imperishable, immutable, abiding, permanent, enduring, infinite, boundless, timeless; More
(of truths, values, or questions) valid for all time; essentially unchanging.

"eternal truths of art and life"

INFORMAL
seeming to last or persist forever, especially on account of being tedious or annoying.

"eternal nagging demands"

synonyms:constant, continual, continuous, perpetual, persistent, sustained, unremitting, relentless, unrelenting, unrelieved, uninterrupted, unbroken, unabating, interminable, never-ending, nonstop, round-the-clock, always-on, incessant, endless, ceaseless

"the price of freedom is eternal vigilance"

'Define'? We can create the concept, but our brain is incapable of reeling it in. Why is there anything at all? And... what would be the alternative? It can't be nothing as we imagine it, because emptiness is something.

Eternal is till tomorrow

Eternal means with no boundaries whatsoever.

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