Opus, opus |

lat., lit. - umsebenzi, indalo, indaba; blind - noma.

Igama elisetshenziselwa ukuchaza indlela umqambi adala ngayo izingoma. Njengomthetho, isetshenziswa lapho ishicilelwa. Ezimweni lapho ukushicilelwa okunikeziwe komqambi kuqale khona sekwephuzile kakhulu (F. Schubert), ukulandelana kwe-O. akuhambelani njalo nokuhleleka okudalwe ngakho. Ngokuvamile, ikakhulukazi esikhathini esidlule, abaqambi banyathelisa ngaphansi kwe-O. eziningana. op. uhlobo olulodwa; ngenkathi i-Op ngayinye. ngaphezu kwalokho wathola inombolo yayo "ngaphakathi" O. (ngokwesibonelo, L. Beethoven sika upiyano trio op. 1 Cha 1, op. 1 Cha 2 futhi op. 1 Cha 3, njll.). Lapho ushicilela i-Op. kusukela efeni lomqambi, igama elithi opus posthumum (upus pustumum, lat. – posthumous composition, abbr. – op. posth.) liyasetshenziswa. Kule ncazelo engenhla, igama elithi “O.” yaqala ukusetshenziswa ku-con. Ikhulu le-16 Phakathi kwezinhlelo zokuqala, ezihlonyiswe ngegama elithi “O.”, kukhona “ama-Solemn motets” (“Motecta festorum”, op. 10) of Viadana (Venice, 1597), “Venetian gondola” (“La Barca da Venezia” , op. 12 ) Banchieri (Venice, 1605). Kusuka ku-con. 17 kweza. Ikhulu le-18 lalibhalwe ukuthi “O.” eshicilelwe ch. ar. instr. izindatshana. Ngesikhathi esifanayo, i-O. yayinanyathiselwe abashicileli, futhi ngokuvamile i-Op efanayo. abashicileli abahlukene baphume ngaphansi kwe-decomp. O. (ikhiqizwe ngu-A. Corelli, A. Vivaldi, M. Clementi). Kusukela ngesikhathi sika-Beethoven kuphela lapho abaqambi ngokwabo baqala ukubeka phansi izinombolo ze-O. zezingoma zabo, kodwa isiteji. umkhiqizo. futhi imidlalo emincane yayivame ukushicilelwa ngaphandle kwegama elithi O. Kwamanye amazwe, i-nat yabo. okuhlukile kwegama elithi “O.” – “oeuvre” in France, “composition” (abbr. “op.”) in Russia.