1. A high gear used at high speeds to maintain the driving speed with less output power
   "He shifted into overdrive on the highway to improve fuel efficiency"
    
2. 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"

1. Drive or work too hard
   "Overdriving people often suffer stress"
    
2. Make use of too often or too extensively
   "The company overdrove its staff, leading to burnout";
   - overuse, overutilise [Brit], overutilize

Derived forms: overdrove, overdriving, overdriven, overdrives

Type of: action, activeness, activity, apply, employ, exploit, high, high gear, overwork, use, utilise [Brit], utilize

Encyclopedia: Overdrive