1. 〔同時に〕at once, at a time, at the same time, simultaneously;〔一挙に〕at 「a stretch [one sitting];〔皆いっしょに〕all together
    • 一度に二つの事に集中することはできない
    • You can't concentrate on two things at a time.
    • みんな一度に入ろうとしては駄目だ
    • Don't try to get in all together.
    • 一度にどっと疲れが出た
    • All at once [Suddenly] I felt exhausted.