Definition of ambrosian

• a. - Ambrosial.
• a. - Of or pertaining to St. Ambrose; as, the Ambrosian office, or ritual, a formula of worship in the church of Milan, instituted by St. Ambrose.
• a. - Ambrosial.
• a. - Of or pertaining to St. Ambrose; as, the Ambrosian office, or ritual, a formula of worship in the church of Milan, instituted by St. Ambrose.