Final answer:
Ars Nova translates to 'new art' and denotes a fourteenth-century musical style that introduced changes in rhythm, melody, and harmony.
Step-by-step explanation:
Ars Nova translates to "new art" in Latin. The term was used by composers of the fourteenth century to describe a new musical style that featured changes in rhythm, melody, and harmony. This period represented a shift from the musical practices of the Middle Ages to more complex and expressive forms, mirroring broader artistic, cultural, and intellectual transformations of the time.