Longman Dictionary of Contemporary English
school governor
noun
EXAMPLES FROM CORPUS
▪ And school governor is fined for importing pornographic material.
▪ He is a parish councillor, school governor and a member of Yorkshire Water Consultative Committee.
Wikipedia
School governor
In England, Wales and Northern Ireland, school governors are members of a school's Governing Body. In state schools they have responsibility for raising school standards through their three core strategic functions of:
a. Ensuring clarity of vision, ethos and strategic direction;
b. Holding the headteacher to account for the educational performance of the school and its pupils; and
c. Overseeing the financial performance of the school and making sure its money is well spent.
They are the largest volunteer force in the country.