A quad is a rectangular shaped area, especially on a university campus, that's enclosed by buildings. Your college friend might tell you to meet her in the quad after lunch.

Quad is an abbreviation, most commonly short for quadrangle, a kind of four-sided courtyard usually defined by a large lawn and surrounded by buildings. Another kind of quad — also an abbreviation — is the large muscle in the top of your thigh, more formally known as a quadriceps muscle. Quadrangle and its nickname, quad, were 1800's Oxford slang, from the Latin root quadri, or "four."

Definitions of quad
  1. noun
    a rectangular area surrounded on all sides by buildings
    synonyms: quadrangle
    see moresee less
    type of:
    a part of a structure having some specific characteristic or function
  2. noun
    (printing) a block of type without a raised letter; used for spacing between words or sentences
    synonyms: space
    see moresee less
    hair space
    (printing) the narrowest of the spaces used to separate words or letters
    type of:
    a small metal block bearing a raised character on one end; produces a printed character when inked and pressed on paper
  3. noun
    one of four children born at the same time from the same pregnancy
    synonyms: quadruplet
    see moresee less
    type of:
    sib, sibling
    a person's brother or sister
  4. noun
    a muscle of the thigh that extends the leg
    synonyms: musculus quadriceps femoris, quadriceps, quadriceps femoris
    see moresee less
    type of:
    extensor, extensor muscle
    a skeletal muscle whose contraction extends or stretches a body part
Word Family

Test prep from the experts

Boost your test score with programs developed by’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.


  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week


  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week


  • Number of words: 700+
  • Duration: 10 weeks
  • Time: 1 hour / week