chair

a seat for one person, with a support for the back; "he put his coat over the back of the chair and sat down"

the position of professor; "he was awarded an endowed chair in economics"

the officer who presides at the meetings of an organization; "address your remarks to the chairperson"

an instrument of execution by electrocution; resembles an ordinary seat for one person; "the murderer was sentenced to die in the chair"

a particular seat in an orchestra; "he is second chair violin"

act or preside as chair, as of an academic department in a university; "She chaired the department for many years"

preside over; "John moderated the discussion"