in charge or responsible for something
Examples:
- I made the best offer on that house. I’m in the driver’s seat.
- Since Ellen was the boss, she was in the driver’s seat at the meeting.
- With Heath off sick, that puts you in the driver's seat for this summer's events schedule.
- After the acquisition, the new parent company was firmly in the driver's seat.
Synonyms: in the saddle, in charge, in control, at the helm