Definition of quad
- The F/A-18 flight-control system … is characterized by quad redundancy, which means that there are essentially four levels of sensing and actuation for each control surface.
- —McGraw-Hill Yearbook Of Science And Technology
- Quad skates are roller skates that have four wheels arranged in two rows, while inline skates have them in one line.
- —Jenee Osterheldt
- Domestic quad listening needs two additional loudspeakers over stereo, and two more amplifiers, plus the black box which allocates some of the sounds to the rear left/right, and others to the front left/right.
- —George Steedman
Seen and Heard
What made you want to look up quad? Please tell us where you read or heard it (including the quote, if possible).