What is the meaning of Eternal?

Lasting forever; unending.

Existing outside time; as opposed to sempiternal, existing within time but everlastingly.

Constant; perpetual; ceaseless; ever-present.

Exceedingly great or bad; used as an intensifier.

One who lives forever; an immortal.

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eternal

Eternal, permanent; having existed (and existing) forever.

Endless, unending; lasting forever.

Long-lasting; non-ephemeral.

eternal

eternal

eternal

Source: wiktionary.org