| Noun | 1. | quad - one of four children born at the same time from the same pregnancy |
| 2. | quad - a muscle of the thigh that extends the leg extensor, extensor muscle - a skeletal muscle whose contraction extends or stretches a body part thigh - the part of the leg between the hip and the knee | |
| 3. | quad - (printing) a block of type without a raised letter; used for spacing between words or sentences hair space - (printing) the narrowest of the spaces used to separate words or letters type - a small metal block bearing a raised character on one end; produces a printed character when inked and pressed on paper; "he dropped a case of type, so they made him pick them up" printing process, printing - reproduction by applying ink to paper as for publication | |
| 4. | quad - a rectangular area surrounded on all sides by buildings area - a part of a structure having some specific characteristic or function; "the spacious cooking area provided plenty of room for servants" |