1-What is engine flame out?
2-What is engine roll back?
3-What is engine seized?
4-What is engine failure?
1 - just what it sounds like, an inability to maintain combustion.
2 - during start an engine peaks out at a high start temperature then "rolls back" to idle.
3 - mechanical failure that prevents it from rotating
4 - when an engine quits operating or operates un commanded outside of safe limitations