Plain English Meaning

A spin the pilot did not mean to enter. The airplane stalls while turning or yawing, one wing drops, and the aircraft begins rotating downward before the pilot realizes what happened.

Full Definition

An unintended spin entry, where an aircraft departs controlled flight into an autorotative descent — a stalled condition combined with yaw — without the pilot intending it. It typically results from a stall accompanied by uncoordinated flight, often during low-speed maneuvering such as steep turns from base to , , or distracted .