definition of
quad

[1] #1 quad n. [quadruplet] one of four children born at the same time from the same pregnancy. wn

[2] #2 quad n. [quadriceps, quadriceps femoris, musculus quadriceps femoris] a muscle of the thigh that extends the leg. wn

[3] #3 quad n. [space] (printing) a block of type without a raised letter; used for spacing between words or sentences. wn

[4] #4 quad n. [quadrangle] a rectangular area surrounded on all sides by buildings. wn