[ad. L. Ambrosiān-us, f. Ambrosius (same word as in prec., used as prop. name) St. Ambrose, bishop of Milan.] Of, pertaining to, or instituted by, St. Ambrose.
1609. Douland, Ornithop. Microl., 27. A Song ending in D lasolre, or in C fa ut, is either an Ambrosian song, or corrupted with the ignorance of Cantors.
1753. Chambers, Cycl. Supp., Ambrosian rite or office denotes a particular office or formula of worship used in the church of Milan, which is sometimes called the Ambrosian church…. The public library at Milan is also called the Ambrosian Library.
1880. Helmore, in Grove, Dict. Mus., I. 60/2. The Ambrosian chant was eventually merged, but certainly not lost, in that vast repertory of plainsong, whether then ancient or modern, which we now call Gregorian.
2. Of the Ambrosian Library: see prec.
1724. Waterland, Athan. Creed., x. 148. Some words are wanting in the Ambrosian manuscript.
