1N-COUNT [usually singular, oft NOUN n](汽车的)超速挡,超速变速器 The overdrive in a vehicle is a very high gear that is used when you are driving at high speeds. (汽车的)超速挡,超速变速器
The overdrive switch was on the steering column.
超速挡的开关在转向杆上。
2PHRASE 加倍努力(或紧张) If you go into overdrive, you begin to work very hard or perform a particular activity in a very intense way. 加倍努力(或紧张)
In the courtroom everybody went into overdrive, assuming that there might well be a verdict soon.