In classical music obbligato usually describes a musical line that is in some way indispensable in performance. Its opposite is the marking ad libitum.
obbligatoとは意味:obbligato オブリガート obbligato meaning: Noun: obbligato (obbligati,obbligatos) `óbli'gaatow A persistent but subordinate motif - obligato A part of the score that must be performed without change or omission - ...obbligato en francais:n. obligation, devoirobbligato 뜻:adjective, noun, (반주가) 꼭 필요한, 조주obbligato перевод:1) _муз. облигато