chairmanchair·man /ˈtʃeəmənˈtʃer-/ noun (plural chairmen /-mən/) [countableC]1someone, especially a man, who is in charge of a meeting or who directs the work of a committee or organizationSYN CHAIRThe chairman then declared the meeting closed.
Morrison had been elected chairman of the party’s Campaign Committee.
2 (also chairman of the board)JOBCOMMERCE the person who is in charge of a large company or organization, especially the most senior member of its BOARDSYN CHAIRMicrosoft chairman, Bill Gates
He will remain chairman of the company.
→ deputy chairman → executive chairman → vice chairman