1. device consisting of a set of keys on a piano or organ or typewriter or typesetting machine or computer or the like
2. holder consisting of an arrangement of hooks on which keys or locks can be hung
The Collaborative International Dictionary of English v.0.48:
Keyboard \Key"board`\, n.
The whole arrangement, or one range, of the keys of an
organ, piano, typewriter, etc.; that part of a device
containing the keys used to operate it.
WordNet (r) 3.0 (2006):
n 1: device consisting of a set of keys on a piano or organ or
typewriter or typesetting machine or computer or the like
2: holder consisting of an arrangement of hooks on which keys or
locks can be hung
Moby Thesaurus II by Grady Ward, 1.0:
21 Moby Thesaurus words for "keyboard":
autotype, choir, claviature, console, echo, eighty-eight,
electrotype, fingerboard, great, ivories, keys, linotype, manual,
monotype, organ manual, palaeotype, pedals, piano keys, solo,
The Free On-line Dictionary of Computing (18 March 2015):
A hardware device consisting of a number of
mechanical buttons (keys) which the user presses to input
characters to a computer.
Keyboards were originally part of terminals which were
separate peripheral devices that performed both input and
output and communicated with the computer via a serial line.
Today a keyboard is more likely to be connected more directly
to the processor, allowing the processor to scan it and detect
which key or keys are currently pressed. Pressing a key sends
a low-level key code to the keyboard input driver routine
which translates this to one or more characters or special
Keyboards vary in the keys they have, most have keys to
generate the ASCII character set as well as various
function keys and special purpose keys, e.g. reset or volume