Definition of “exhaust” - Learner’s Dictionary

exhaust

verb [ T ] uk us /ɪɡˈzɔːst/
SUPPLY

to finish all of the supply of something:

How long will it be before the world's fuel supplies are exhausted?
TIRED

to make someone very tired:

The long journey exhausted me.
SUBJECT

to say everything possible about a subject:

We seem to have exhausted that topic of conversation.

(Definition of “exhaust verb” from the Cambridge Learner's Dictionary © Cambridge University Press)