olemus
Wiktionary, noun:
2. (Canada, US, Australia, New Zealand) the chief administrator of a school
3. (Britain, Canada) the chief executive and chief academic officer of a university or college

näiteid
https://en.wikipedia.org/wiki/Principal_(academia)

https://en.wikipedia.org/wiki/Head_teacher

https://en.wikipedia.org/wiki/Civil_Service_(United_Kingdom)#Grading_schemes