Word of the Day - Burn-out

burn·out
[burn-out]

noun
1.a fire that is totally destructive of something.

2.Also, burn-out . fatigue, frustration, or apathy resulting from prolonged stress, overwork, or intense activity.

3.Rocketry .
     a.the termination of effective combustion in a rocket engine, due to exhaustion of propellant.

     b.the end of the powered portion of a rocket’s flight.

4.Electricity . the breakdown of a lamp, motor, or other electrical device due to the heat created by the current flowing through it.