generation; lifetime; age
彼が一代で築いた財産は莫大だ。
The fortune he built in his lifetime is enormous.
後継者がおらず、この寺は住職一代限りとなる。
With no successor, this temple will close after the current head priest's lifetime.
彼はまさに一代の英雄だった。
He was truly a hero of his age.