obbligato

English Thesaurus

1. a part of the score that must be performed without change or omission (noun.communication)

hypernym	:	section, subdivision,
definition	:	a self-contained part of a larger composition (written or musical) (noun.communication)

2. a persistent but subordinate motif (noun.communication)

hypernym	:	motif, motive,
definition	:	a theme that is repeated or elaborated in a piece of music (noun.communication)