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mid-14c., "to shoot, run, or pass beyond (a point or limit)," over- + shoot (v.). Related: Overshot; overshooting.
1530s, in reference to water-wheels, "driven by water shot over from above," past participle adjective from overshoot.
overshoot o·ver·shoot (ō'vər-shōōt')n. A change from steady state in response to a sudden change in some factor, as in electric potential or polarity when a cell or tissue is stimulated.