overdrive

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overdrive
  • noun
    A gear in a motor vehicle providing a gear ratio higher than that of direct drive (the usual top gear), so that the engine speed can be reduced at high road speeds to lessen fuel consumption or to allow further acceleration.
    A state of great or excessive activity. (the city's worried public relations group went into overdrive)
    verb
    Drive or work to exhaustion. (an overdriven mother of ten children)
    Give (an electric guitar) a distorted sound. (pounding drums and overdriven electric guitars)

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