jack jak Your browser does not support the audio element. [ English ] Definition 1. In a harpsichord, clavichord, or virginal, the jack is the device attaching the plectrum to the key, enabling the depression of the key to cause the plectrum to pluck the string. 2. In a piano, the jack is the pivoted, vertical lever that causes the hammer to rise when a key is depressed. Share Share on Facebook (opens in a new tab) Share on X (opens in a new tab) Last Updated: 2016-05-19 18:10:35
