Main Entry: ¹key·board

Pronunciation: \ˈkē-ˌbȯrd\

Function: noun

Date: 1819

1 : a bank of keys on a musical instrument (as a piano) that usually consists of seven white and five raised black keys to the octave
2 : an assemblage of systematically arranged keys by which a machine or device is operated
3 : a board on which keys for locks are hung
4 : a musical instrument that is played by means of a keyboard