keyboardkey‧board /ˈkibɔrd/ ●●● noun [countable] 1 computers a piece of equipment with buttons that have letters or numbers on them, which you press to put information into a computer2eng. lang. arts a row of keys on a musical instrument, such as a piano, that you press in order to play the instrument3eng. lang. arts an electronic musical instrument similar to a piano, that can make the sounds of various musical instruments