burn‧out /ˈbɜːnaʊt $ ˈbɜːrn-/ noun

1. [uncountable] the feeling of always being tired because you have been working too hard:
Many of the teachers are suffering from burnout.

2. [uncountable and countable] the time when a rocket or jet has finished all of its fuel and stops operating

[TahlilGaran] Dictionary of Contemporary English ▲