Source : Webster's Revised Unabridged Dictionary (1913)

Ambrosian \Am*bro"sian\, a.
   Ambrosial. [R.] --. Jonson.

Ambrosian \Am*bro"sian\, 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.

   {Ambrosian chant}, the mode of signing or chanting introduced
      by St. Ambrose in the 4th century.

Source : WordNet®

Ambrosian
     adj 1: of or by or relating to Saint Ambrose; "Ambrosian chants"
     2: extremely pleasing to the taste; sweet and fragrant; "a
        nectarous drink"; "ambrosial food" [syn: {ambrosial}, {nectarous}]
     3: worthy of the gods [syn: {ambrosial}]