outrider

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out·rid·er / ˈoutˌrīdər/ • n. a person in a motor vehicle or on horseback who goes in front of or beside a vehicle as an escort or guard: an escort of police outriders. ∎  a person or thing that accompanies or precedes another, esp. as a precursor: gray-white cumulus clouds—outriders of the storm. ∎  a mounted official who escorts racehorses to the starting post. ∎  a cowhand who prevents cattle from straying beyond a certain limit.DERIVATIVES: out·rid·ing / ˌoutˈrīding/ n.

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