- The definition of an opus is a large scale creative work, especially a musical composition or set of musical compositions, numbered by date.
A musician's series of works organized by date of publication is an example of an opus.
opus definition by Webster's New World
Origin: Classical Latin a work ; from Indo-European an unverified form ops ; from base an unverified form op-, to work, riches from source Classical Latin ops, riches, Sanskrit ápas-, work, Old English efnan, to work, do
opus definition by American Heritage Dictionary
noun pl. o·pe·ra or o·pus·es
Origin: Latin; see op- in Indo-European roots.