verb
definition
(transitive) To drive too hard, or far, or beyond strength.
noun
definition
(dated, automotive) A gear, on an automobile, higher than the traditionally normal top gear, mainly to allow better fuel economy at highway speeds. In the 21st century, such gears are no longer viewed as "extra" and thus are often not called by this name anymore.
definition
(uncountable, figurative) A state of heightened activity.
definition
(euphemistic, slang) Freewheeling (driving a vehicle with the transmission in neutral) on downhill stretches to achieve higher fuel economy and/or speed than otherwise. In colloquial registers, ethnically bigoted variants have been common, such as Jewish overdrive (alluding to the stereotype of miserly Jews) or Mexican overdrive or Polish overdrive (alluding to stereotypes of foolishness and poverty).
definition
(engineering, mechanical) A gear ratio higher than 1:1: one in which a single revolution of the driving element corresponds to more than one revolution of the driven element.