GNU Collaborative International Dictionary of English

Found one definition 

  1.       

    Canto , n.; pl. Cantos . [It. canto, fr. L. cantus singing, song. See Chant.]
    1. One of the chief divisions of a long poem; a book.
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    2. (Mus.) The highest vocal part; the air or melody in choral music; anciently the tenor, now the soprano.
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      ‖Canto fermo  [It.] (Mus.), the plain ecclesiastical chant in cathedral service; the plain song.
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