Pronunciation: (ō'pus), [key]
—pl. o•pus•es or, esp. for 1, 2, o•pe•raPronunciation: (ō'pur-u, op'ur-u). [key]
1. a musical composition.
2. one of the compositions of a composer, usually numbered according to the order of publication.
3. a literary work or composition, as a book: Have you read her latest opus? Abbr.: op.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.