Meaning of overdrive

(noun) 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"

a high gear used at high speeds to maintain the driving speed with less output power

(verb) drive or work too hard; "The teacher is overworking his students"; "Overdriving people often suffer stress"

make use of too often or too extensively