- overspeed⇄noun speed that is more than normal.
Ex. An audible speed warning system which conveys ... the degree of overspeed (New Scientist). - overspeed⇄overspeed, verb, -spedor-speeded,-speeding,noun.
- overspeed⇄v.i. to run at too high a speed.
Ex. Then an indicator showed that one of the six engines was overspeeding (Time). - overspeed⇄v.t. to operate (a motor, vehicle, boat, or other device) at excessive speeds.