Definition of "oxer" [oxer]

• A type of horse jump with two rails that may be set even or uneven. (noun)

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• "Erin, who is cruel and exacting, has a particularly brutal exercise where she has us canter between the two rails of an oxer, or spread fence, so that we are perfectly straight as we approach a crossrail."
• "Of course the next fence, an oxer with a pole in front and back, is the biggest and most imposing jump on the course."
• "The lightest check on the reins, to tell him I am back in business, and pressure from my restored calves, to bring his canter up and bouncy and strong into the oxer."