n. (pl. opuses or opera)
1. Mus. a a separate musical composition or set of compositions of any kind. b (also op.) used before a number given to a composer's work, usu. indicating the order of publication (Beethoven, op. 15).
2 any artistic work (cf. MAGNUM OPUS).
Phrases and idioms:
opus Dei Eccl.
1. liturgical worship regarded as man's primary duty to God.
2 (Opus Dei) a Roman Catholic organization of laymen and priests founded in Spain in 1928 with the aim of re-establishing Christian ideals in society.
Etymology: L, work