"overdrives" in the noun sense
1. overdrive
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"
2. overdrive
a high gear used at high speeds to maintain the driving speed with less output power
"overdrives" in the verb sense
1. overdrive
drive or work too hard
"The teacher is overworking his students"
"Overdriving people often suffer stress"
2. overuse, overdrive
make use of too often or too extensively
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License