n. The inner area of the portico of a Greek or Roman temple
the GNU version of the Collaborative International Dictionary of English
n. The porch or vestibule of a temple.
The Century Dictionary and Cyclopedia
n. In architecture: An open vestibule or portico in front of the naos or cella of a temple. See naos, 2.
n. Same as narthex, 1.
Word Usage
"Along the centre of three of the interior walls of the pronaos is a compartment of sculpture, the other parts of the walls being quite bare; a peculiarity I saw no where else."