/ ɪgˈzæmɪnə(r); NAmE / noun
1.
a person who writes the questions for, or marks / grades, a test of knowledge or ability :
The papers are sent to external examiners (= ones not connected with the students' school or college) .
2.
( especially NAmE ) a person who has the official duty to check that things are being done correctly and according to the rules of an organization; a person who officially examines sth
—see also medical examiner