Quad
- 4
- Cameron–Clegg coalition
- Four-of-a-kind
- I2U2 Group
- Jeffery Quad
- Matthias Quad
- Morris C8
- QUAD (cipher)
- QUaD
- Quad (arts centre)
- Quad (company)
- Quad (figure skating)
- Quad (film)
- Quad (geography)
- Quad (music)
- Quad (play)
- Quad (rocket)
- Quad (studio)
- Quad (typography)
- Quad (unit)
- Quad Cinema
- Quad Cities
- Quad Electroacoustics
- Quad Flat Package
- Quad antenna
- Quad bike
- Quad scull
- Quad skates
- Quadcopter
- Quadracycle
- Quadrangle (architecture)
- Quadrangle (disambiguation)
- Quadraphonic sound
- Quadrat
- Quadrennium
- Quadriceps
- Quadrilateral
- Quadrilateral Security Dialogue
- Quadrilateral group
- Quadriplegic
- Quadrupel
- Quadruple combination
- Quadruple-double
- Quadruplets
- Quadruplex videotape
- Sako Quad
- Star quad cable
- The Linq
- The Quad (TV series)