Primary meaning: A square or rectangular open space, usually surrounded by buildings, as found on a university campus or school grounds.
Origin: From the Latin "quadrus," meaning "square." The term was first used in the 16th century to refer to the quadrangular courtyards of Oxford and Cambridge universities.
Other Meanings:
A group of four people or things: From the Old English "cweatern," meaning "four."
A four-wheeled motor vehicle: From the French "quadre," meaning "square." This term originated in the late 19th century to describe all-terrain vehicles with four wheels.
A four-seat motorized scooter: From the same French origin as the four-wheeled motor vehicle.
A subset of the RNA molecule with four nucleotides: From the Latin "quadrus," meaning "four."
A term used in computer programming to refer to four bits: Also derived from the Latin "quadrus."