The definition of a rectangle is a four-sided figure or shape with four right angles that isn't a square.
(noun)An example of a rectangle is the shape of a an 8x10 picture frame.
See rectangle in Webster's New World College Dictionary
noun
Origin: Fr < ML rectangulum < L rectus (see recti-) + angulus, angle
See rectangle in American Heritage Dictionary 4
noun
Origin:
Origin: French
Origin: , from Medieval Latin rēctangulum, a right triangle
Origin: , from Late Latin rēctiangulum
Origin: : Latin rēctus, right; see reg- in Indo-European roots
Origin: + Latin angulus, angle
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