Word parts head + master Pronunciation (US) IPA (key): /ˈhɛdˌmæstɚ/ (UK) IPA (key): /ˈhɛdˌmɑːstə/ Audio (UK)(file) Hyphenation: head‧mas‧ter Noun Singular headmaster Plural headmasters (countable) A headmaster is a man who is in charge of a school. The headmaster talked to the parents. Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads