(education, historical) The higher division of the seven liberal arts in the Middle Ages, composed of geometry, astronomy, arithmetic, and music.

Divided into four parts. / Involving four parties or participants; four-party.

A treatise divided into four parts.

paper marked out with squares

A dance originating in the mid-1700s with four couples forming a square, rather much like the modern square dance. / The music for this dance.

(intransitive) To dance the quadrille.

Quadrille ruled graph paper, quad paper.

A square tiling of the plane.

(anatomy) In human anatomy, a tendon that connects the quadriceps femoris muscles to the superior aspects of the patella on the anterior of the thigh.

Relating to a 400th anniversary.