Definition of parallelogram noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌpærəˈleləɡræm//
; NAmE NAmE//ˌpærəˈleləɡræm//
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a flat shape with four straight sides, the opposite sides being parallel and equal to each other Word Originlate 16th cent.: from French parallélogramme, via late Latin from Greek parallēlogrammon, from parallēlos ‘alongside another’ + grammē ‘line’.
See the Oxford Advanced American Dictionary entry: parallelogram