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.
例句
The Government has set up a committee under the chairmanship of Professor Roy Goode.政府设立一个委员会,任命罗伊·古德教授为主席。
英汉词典释义
n.
主席的地位、身份或任期
The chairmanship of this committee is in the minister’s gift.该委员会主席由部长委派。Who will be appointed to the chairmanship when Mr.Bell leaves?贝尔先生离职以后,谁会被派来担任主席?No,he’s been installed in the chairmanship for too long to be dismissed now.不,他任主席的时间太长了,现在无法撤销他的职务。