chair

(noun) a seat for one person, with a support for the back. Examples: "He put his coat over the back of the chair and sat down."

(noun) the position of professor. Synonyms: professorship. Examples: "He was awarded an endowed chair in economics."

(noun) the officer who presides at the meetings of an organization. Synonyms: president, chairman, chairwoman, chairperson. Examples: "Address your remarks to the chairperson."

(noun) an instrument of execution by electrocution; resembles an ordinary seat for one person. Synonyms: electric chair, death chair, hot seat. Examples: "The murderer was sentenced to die in the chair."

(noun) a particular seat in an orchestra. Examples: "He is second chair violin."

(verb) act or preside as chair, as of an academic department in a university. Synonyms: chairman. Examples: "She chaired the department for many years."

(verb) preside over. Synonyms: moderate, lead. Examples: "John moderated the discussion."