chairman of the board
noun[C]
ukusWORKPLACE,MANAGEMENT
thepersonwho is inchargeof alargecompanyandleadsitsboardofdirectors:
Thechairmanof theboardfunctionsas thespokespersonfor theboardand thecompany.
appoint sb (as) chairman of the boardAboardmembersince 2009, he wasappointedchairmanof theboardin 2011.