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1798, from Spanish trampolin "springboard," and Italian trampolino, from trampoli "stilts," from a Germanic source (cf. Low German trampeln "trample") related to tramp.
an elevated, resilient webbed bed or canvas sheet supported by springs in a metal frame and used as a springboard for tumbling. Trampolining, or rebound tumbling, is an individual sport of acrobatic movements performed after rebounding into the air from the trampoline.