Definition of centre part in US English:

centre part

(US center part)

noun

North American
  • A parting in a person's hair which runs along the middle of the head (rather than to one side).

Origin

Late 19th century; earliest use found in The Boston Globe. From centre [adjective] + part.

Pronunciation

centre part

/ˌsɛntə ˈpɑːt/