from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An input device, sometimes part of a standard computer keyboard, consisting of a separate grid of numerical and function keys arranged for efficient data entry.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A small board with keys primarily used for tactile input into a machine.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a keyboard that is a data input device for computers; arrangement of keys is modelled after the typewriter keyboard
From key + pad. (Wiktionary)