key·board

[kee-bawrd, -bohrd]
noun
1.
the row or set of keys on a piano, organ, or the like.
2.
a set of keys, usually arranged in tiers, for operating a typewriter, typesetting machine, computer terminal, or the like.
3.
any of various musical instruments played by means of a pianolike keyboard, as a piano, electric piano, or organ.
verb (used with object), verb (used without object)
4.
Also, key, key in. Computers. to enter (information) into a computer by means of a keyboard.
5.
to set (text) in type, using a machine that is operated by a keyboard.
00:10
Keyboard is always a great word to know.
So is callithumpian. Does it mean:
a scrap or morsel of food left at a meal.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.

Origin:
1810–20; key1 + board

key·board·er, key·board·ist, noun
re·key·board, verb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
keyboard (ˈkiːˌbɔːd) [Click for IPA pronunciation guide]
 
n
1.  a.  a complete set of keys, usually hand-operated, as on a piano, organ, typewriter, or typesetting machine
 b.  (as modifier): a keyboard instrument
2.  (often plural) a musical instrument, esp an electronic one, played by means of a keyboard
 
vb
3.  to set (a text, etc) in type, onto magnetic tape, or into some other medium, by using a keyboard machine
 
'keyboarder
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

keyboard
1819, from key (1) in sense of "mechanism of a musical instrument" + board. Originally of pianos, organs, etc., extended to other machines 1846. The verb is first recorded 1961. Keypad is from 1975; keypunch is from 1933. Keystroke first attested c.1910.
Online Etymology Dictionary, © 2010 Douglas Harper
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FOLDOC
Computing Dictionary

keyboard definition

hardware
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 actions.
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 control.
(2003-07-04)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
There are many reasons why you might not want to use the keyboard for composing
  text.
Sumptuous singing and lyricism at the keyboard are always collectable.
Your keyboard should be positioned relatively low, near the elbow height.
There is no option to use keyboard commands during a video, similar to those
  used in video games.
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