Definition of head of house in US English:

head of house

noun

British
  • 1The principal of a college at the University of Oxford or Cambridge.

  • 2The most senior pupil of a (boarding) house in a school; (also) the teacher responsible for the welfare and development of the pupils in such a house.

Origin

Late 16th century; earliest use found in Edmund Grindal (d. 1583), archbishop of York and of Canterbury. From head + of + house.

Pronunciation

head of house

/ˌhɛd əv ˈhaʊs/