Definition of proaulion in US English:

proaulion

noun

Architecture Archaeology
  • A vestibule or forecourt in a church or temple; specifically a portico or colonnade opening into the narthex.

Origin

Mid 19th century; earliest use found in William T. Brande (1788–1866), chemist. From Hellenistic Greek προαύλιον vestibule from ancient Greek προ- + αὐλή court + -ιον, diminutive suffix.

Pronunciation

proaulion

/prəʊˈɔːlɪən/