Plain English Meaning
The engine quits or loses power while you are flying. You then have to fly the airplane on its glide, find somewhere to land, try to get the engine running again, and if that fails, land safely without engine power.
Full Definition
A partial or complete loss of engine power that occurs after takeoff and while the airplane is airborne, requiring the pilot to maintain aircraft control, establish best glide speed, select a suitable landing area, attempt a restart if conditions permit, and prepare for an off-airport landing if a restart is not achieved.
Context Anchor
Encountered in emergency procedures, , and discussions for what to do if the engine loses power after takeoff, during the , or near the airport.