Plain English Meaning
A type of FAA approval given to airplanes built for everyday flying, not for aerobatics. The category sets limits on what maneuvers the airplane is allowed to perform.
Full Definition
An FAA airworthiness category for airplanes certificated under 14 CFR Part 23 that are intended for non-acrobatic operations, including any maneuver incident to normal flying, stalls (other than whip stalls), and lazy eights, chandelles, and steep turns in which the bank angle does not exceed 60 degrees.