Is “Exhaust” a Scrabble word?

1. 1.A system consisting of the parts of an engine through which burned gases or steam are discharged; see also exhaust system.

2. 2.The steam let out of a cylinder after it has done its work there.

3. 3.The dirty air let out of a room through a register or pipe provided for the purpose.

1. 1.To draw or let out wholly; to drain off completely

   “Moisture of the earth is exhausted by evaporation.”

2. 2.To empty by drawing or letting out the contents

   “to exhaust a treasury”

3. 3.To drain; to use up or expend wholly, or until the supply comes to an end

   “I exhausted my strength walking up the hill.”

Synonyms: consume, spend, tire out, weary

1. 1.Exhausted; used up.