eonKK [ˋiən] /ˈiən/發音名詞1永世、無限長的時間、很久常用複數It feels like eons since we last had a proper conversation.感覺上次好好聊天已經是很久以前的事了。2宙、代地質學The earliest eon in Earth's history lasted about half a billion years.地球歷史上最早的那個宙持續了大約五億年。