Noun

• S: (n) eon, aeon (the longest division of geological time)
• S: (n) eon, aeon (an immeasurably long period of time) "oh, that happened eons ago"
• direct hypernym / inherited hypernym / sister term
• S: (n) long time, age, years (a prolonged period of time) "we've known each other for ages"; "I haven't been there for years and years"
• S: (n) month of Sundays (a time perceived as long) "I hadn't seen him in a month of Sundays"
• S: (n) eon, aeon (an immeasurably long period of time) "oh, that happened eons ago"
• direct hypernym / inherited hypernym / sister term
• derivationally related form
• W: (adj) eonian [Related to: eon] (continuing forever or indefinitely) "the ageless themes of love and revenge"; "eternal truths"; "life everlasting"; "hell's perpetual fires"; "the unending bliss of heaven"
• S: (n) blue moon (a long time) "something that happens once in blue moon almost never happens"
• domain usage
• direct hypernym / inherited hypernym / sister term
• S: (n) year dot (as long ago as anyone can remember) "he has been a conductor since the year dot"
• derivationally related form
• S: (n) eon, aeon ((Gnosticism) a divine power or nature emanating from the Supreme Being and playing various roles in the operation of the universe)