fallboard

English Thesaurus

1. the hinged protective covering that protects the keyboard of a piano when it is not being played (noun.artifact)

hypernym	:	protection, protective cover, protective covering,
definition	:	a covering that is intend to protect from damage or injury (noun.artifact)

part meronym	:	forte-piano, piano, pianoforte,
definition	:	a keyboard instrument that is played by depressing keys that cause hammers to strike tuned strings and produce sounds (noun.artifact)