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aeonian

adjective ae·o·ni·an \ ē-ˈō-nē-ən \
variants: or aeonic play \-ˈä-nik\
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Definition of aeonian

: lasting for an immeasurably or indefinitely long period of time
  • … the whole universe is a realm of aeonian conflicts, slow and mighty …
  • —Gilbert Highet

Origin and Etymology of aeonian

aeonian, from Greek aiṓnios "lasting an age, perpetual" (derivative of aiṓn eon) + 2-an; aeonic from eon + 1-ic

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