Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Language: Latin
Origin: exhaustus, past participle of exhaurire, from haurire 'to draw off liquid, drain'

exhaust

1 verb
     
ex‧haust1 [transitive]
1 to make someone feel extremely tired:
A full day's teaching exhausts me.
exhaust yourself
He'd exhausted himself carrying all the boxes upstairs.
2 to use all of something [= use up]:
We are in danger of exhausting the world's oil supply.
Having exhausted all other possibilities, I asked Jan to look after the baby.
3

exhaust a subject/topic etc

to talk about something so much that you have nothing more to say about it:
Once we'd exhausted the subject of Jill's wedding, I didn't know what to say.

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