n.
1.a seat for one person, with a support for the back
2.the position of professor
3.the officer who presides at the meetings of an organization
4.an instrument of execution by electrocution chair v.
1.act or preside as chair, as of an academic department in a university
2.preside over
Idiom of the Day
into thin air
completely, without anything left
The group of hikers vanished into thin air and were never heard from again.