the state of high or excessive activity or productivity or concentration; "Troops are ready to go into overdrive as soon as the signal is given"; "Melissa's brain was in overdrive"高度、または過度な活動、生産、集中状態オーバードライブ
例:Troops are ready to go into overdrive as soon as the signal is given 合図があるとすぐに、軍はオーバードライブを行う準備ができている
a high gear used at high speeds to maintain the driving speed with less output power少ない出力で運転速度を維持するために高速時に使用されるトップギアオーバードライブ