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



BrE BrE//ˈrektæŋɡl//
; NAmE NAmE//ˈrektæŋɡl//
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a flat shape with four straight sides, two of which are longer than the other two, and four angles of 90° Word Originlate 16th cent.: from medieval Latin rectangulum, from late Latin rectiangulum, based on Latin rectus ‘straight’ + angulus ‘an angle’.
See the Oxford Advanced American Dictionary entry: rectangle