rectangular

The word “rectangular” means shaped like a rectangle, with four right-angled corners. In plain terms, having the shape of a rectangle.

“Rectangular” is pronounced rehk-TANGG-yuu-luh (/ɹɛkˈtæŋɡjəlɚ/ in IPA).

Here is “rectangular” used in a sentence: “They installed a rectangular swimming pool in the backyard.”

“Rectangular” is an adjective.

“Rectangular” is an uncommon word in modern English, usually learned at around the B2 level.

Rectangular describes any shape with four right-angled corners, including shapes where the sides aren't all equal in length. Square is a more specific term for a rectangle whose four sides are all equal, so every square is rectangular but not every rectangle is square.

Rectangular is the general adjective for any four-right-angled shape, while oblong is often used informally to describe a rectangle noticeably longer than it is wide. In precise geometric terms the two largely overlap, but oblong carries a stronger implication of an elongated shape.

Objects like doors, books, tables, and smartphone screens are commonly described as rectangular because they have four right-angled corners with two pairs of equal sides. The term is used across contexts from architecture to product design.