What does "ageless" mean?

Having existed for so great a period of time that its longevity cannot be expressed.

What is a synonym for "ageless"?

Common synonyms include: eternal, aeonian, age old, age-old, ancient, antique.

adj

adj ·2 syllables ·Uncommon ·College level

Adjective

1
Having existed for so great a period of time that its longevity cannot be expressed.
"The ageless pyramids stood prominently against the sunset."
2
Continuing infinitely or indefinitely.
"This memorial will show our ageless respect to those who died."
3
Always appearing youthful; never seeming to age.
"her ageless face"

Adjective

"Only the body can grow old, the soul is ageless."

From age + -less.