ex ‧ haus ‧ tion /ɪɡˈzɔːstʃ ə n $ -ˈzɒːs-/ BrE AmE noun [uncountable]
1 . extreme tiredness
with exhaustion
He collapsed with exhaustion.
Sheer exhaustion forced him to give up.
Many runners were suffering from heat exhaustion (=when you become tired and ill because you are too hot) .
nervous exhaustion (=when you become ill because you have been working too hard or have been very worried)
2 . when all of something has been used
exhaustion of
the exhaustion of oil supplies