opuses

noun

1. 1

   A work of music or set of works with a specified rank in an ordering of a composer's complete published works.

   “Beethoven's opus eighteen quartets are considered by many to be the beginning of the Romantic era.”

2. 2

   A work, especially of art.

   “The painter's last opus was a dedication to all things living, in a surprising contrast to all of his prior work.”