To be possible; to be conceivable; to be likely or probable.
彼がミスをしたのはあり得る話だが、証拠がない。
It's conceivable that he made a mistake, but there's no evidence.
この結果は間違いである可能性もあり得る。
There is also a possibility that this result is wrong.
そんな高級車がこの値段で買えるとはあり得ない。
It's unlikely that such a luxury car can be bought at that price.
天候次第では開催が中止されることもあり得る。
Depending on the weather, it's possible the event will be canceled.