A quadrangle; a rectangular open area surrounded by buildings, especially on a college campus. The students gathered in the quad for the annual spring festival.
A muscle group consisting of four muscles located at the front of the thigh, known as the quadriceps. After the workout, her quads were sore from all the squats.
A type of all-terrain vehicle (ATV) with four wheels, often used for off-road activities. He took his quad out for a ride through the muddy trails.
A group or unit of four items or people; a quadruple or quadruplet. Each experimental run required a quad of sensors placed around the chamber.
(Printing, historical) A blank metal block used by compositors to create space in lines of type; a quadrat. The typesetter inserted a quad to adjust the spacing between paragraphs.