Definition of rectangle noun from the Oxford Advanced American Dictionary

 

rectangle

 noun
noun
NAmE//ˈrɛkˌtæŋɡl//
 
 
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a flat shape with four straight sides, two of which are usually longer than the other two, and four angles of 90°
rectangular
 
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NAmE//rɛkˈtæŋɡyələr//
 
adjective
See the Oxford Advanced Learner's Dictionary entry: rectangle