adj, noun ·Moderate ·College level

Definitions

Noun

1. 1
   A polygon with four sides.
2. 2
   a four-sided polygon wordnet
3. 3
   An area defended by four fortresses supporting each other.

   "The Venetian quadrilateral comprised Mantua, Peschiera, Verona, and Legnano."

Adjective

1. 1
   Having four sides. not-comparable

Adjective

1. 1
   having four sides wordnet

Synonyms

All synonyms

quadrangletetragon4-gonbifacialbilateralbiquadratic

Example

More examples

"A square is a quadrilateral with four sides the same and where all four corners are right angles."

Etymology

Learned borrowing from Latin quadrilaterus + -al.

Related phrases

cyclic quadrilateralquadrilateral space syndrome

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.