Definitions for "headmaster"
presiding officer of a school
Headmistress – the wizard or witch who oversaw the staff members, facility, and students at Hogwarts; the p ortraits of the former headmasters and headmistresses of Hogwarts hung in Dumbledore's office, and they were duty bound to assist the current headmaster or headmistress, which included traveling to their portraits in other places and reporting on what they saw or delivering messages; after Dumbledore died, his portrait was magically hung in his office