/ ɪgˈzɔːst; NAmE / noun , verb
■ noun
1.
[ U ] waste gases that come out of a vehicle, an engine or a machine :
car exhaust fumes / emissions
2.
(also exˈhaust pipe ) (also tail·pipe especially in NAmE ) [ C ] a pipe through which exhaust gases come out :
My car needs a new exhaust.
—picture at convertible
■ verb [ vn ]
1.
to make sb feel very tired
SYN wear out :
Even a short walk exhausted her.
There's no need to exhaust yourself clearing up—we'll do it.
2.
to use all of sth so that there is none left :
Within three days they had exhausted their supply of food.
Don't give up until you have exhausted all the possibilities.
3.
to talk about or study a subject until there is nothing else to say about it :
I think we've exhausted that particular topic.
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WORD ORIGIN
mid 16th cent. (in the sense draw off or out ): from Latin exhaust- drained out, from the verb exhaurire , from ex- out + haurire draw (water), drain.