archisynagogue UK /ˌɑːkɪˈsɪnəɡɒɡ/US /ˌɑɹkɪˈsɪnəˌɡɑɡ/ noun1 •(Judaism, historical) The head of a synagogue.Only one rabbi of Phrygian origin mentioned in a Palestinian inscription is called an archisynagogue, and only indirect evidence for the possibility of rabbinic chazanim exists. — 1997 formsarchisynagogues