{ } n. [ L. aeon, fr. Gr. a'iwn space or period of time, lifetime, age; akin to L. aevum. See Age. ] 1. An immeasurable or infinite space of time; eternity; a long space of time; an age. [ 1913 Webster ]

The eons of geological time. Huxley. [ 1913 Webster ]

2. (Gnostic Philos.) One of the embodiments of the divine attributes of the Eternal Being. [ 1913 Webster ]

Among the higher æons are Mind, Reason, Power, Truth, and Life. Am. Cyc. [ 1913 Webster ]

☞ Eons were considered to be emanations sent forth by God from the depths of His grand solitude to fulfill various functions in the material and spiritual universe. [ 1913 Webster ]

n. 1. A period of immeasurable duration. See Eon. [ 1913 Webster ]

2. (Gnosticism) a divine power or nature emanating from the Supreme Being and playing various roles in the operation of the universe.
Syn. -- eon [ WordNet 1.5 ]

3. the longest division of geological time; two or more eras.
Syn. -- eon [ WordNet 1.5 ]

a. [ Gr. &unr_;. ] Eternal; everlasting; lasting for an indefinitely long time; immortal; not subject to death. Opposite of mortal. “Æonian hills.” Tennyson.
Syn. -- eonian [ 1913 Webster + WordNet 1.5 ]

2. of or pertaining to an eon. [ WordNet 1.5 ]