- The definition of a rectangle is a four-sided figure or shape with four right angles that isn't a square.
An example of a rectangle is the shape of a an 8x10 picture frame.

This picture frame is a rectangle.

## rectangle

noun

- any four-sided plane figure with four right angles
- any such figure or shape that is not a square; oblong

Origin of rectangle

French ; from Medieval Latin*rectangulum*; from Classical Latin

*rectus*(see recti-) +

*angulus,*angle

## rectangle

noun

A four-sided plane figure with four right angles.

Origin of rectangle

French, from Medieval Latin*rēctangulum*,

*a right triangle*, from Late Latin

*rēctiangulum*: Latin

*rēctus*,

*right*; see

*reg-*in Indo-European roots + Latin

*angulus*,

*angle*.

## rectangle

Noun

(*plural* rectangles)

- (geometry) A quadrilateral having opposing sides parallel and four right angles.

- rectangular
- rectilinear
- rectification
- rectify

Origin

From Middle French, from Old French, from Medieval Latin *rectanglum* (“right angle”), from *rectus* (“right”) + *angulus* (“an angle”).