1A person who conducts, sets, or marks examinations to test knowledge, skill, or competence.
A person who conducts a judicial inquiry, or who formally questions a witness; = "examiner". Frequently in "lord examinator": a judge presiding over a hearing.
Late 15th century; earliest use found in William Caxton (1415x24–1492), printer, merchant, and diplomat. From post-classical Latin examinator investigator, explorer (early 3rd cent. in Tertullian), judge, academic examiner, assayer from classical Latin exāmināt-, past participial stem of exāmināre + -or.