The chairmanship of a committee or organization is the fact of being its chairperson. Someone's chairmanship can also mean the period during which they are chairperson. 主席职位; 主席任期
noun [抽象名词]主席的身份或资格
The government has set up a committee under the chairmanship of Professor Roy Goode. 该政府成立了一个委员会,由罗伊·古德教授担任主席。