Strong's G165 — αἰών (noun)
aion (ai-own') n.
1. (properly) an age
2. (by extension) perpetuity (also past)
3. (by implication) the world
4. (specially, Jewish) a Messianic period (present or future)
[from an obsolete primary noun apparently meaning "continued duration"]
KJV: age, course, eternal, (for) ever(-more), (n-)ever, (beginning of the , while the) world (began, without end) 
Compare: G5550, G2540 
See also: G104 
Occurrences: 122