Fallboard is a term used in the context of musical instruments, particularly pianos. It refers to a hinged lid that covers the keyboard of a piano. Synonyms for the word fallboard include "key cover," "key lid," and simply "lid." Another term that is often used in association with the fallboard is "desk," as the fallboard serves as a support for the music desk on a piano. While fallboard is the most common term used to describe this component of a piano, it is helpful to know the synonyms in order to communicate effectively with others who may use different vocabulary.