Meaning of “rectangle” - Learner’s Dictionary

rectangle

noun [ C ] us uk /ˈrektæŋɡl/

a shape with four 90° angles and four sides, with opposite sides of equal length and two sides longer than the other two

rectangular adjective us uk /rekˈtæŋɡjələr/

B2 shaped like a rectangle:

a rectangular room

(Definition of “rectangle” from the Cambridge Learner’s Dictionary © Cambridge University Press)