Rectangular (adjective)

1. Having the shape of a rectangle.
2. Having four straight sides and four right angles.
3. Having opposite sides parallel to each other.

Origin:

The word "rectangular" comes from the latin word "rectangulus" which means "right angled" which came into use in the early 17th century. it is used to describe something that has the shape of a rectangle i.e a geometric shape that has four straight sides and four right angles (90 degree angles) and opposite sides are parallel to each other.

Examples:

1. The table is rectangular in shape.
2. The room has a rectangular layout.
3. The pool is rectangular in shape.
4. The box is rectangular.
5. The window is rectangular in shape.