Definitions for "Num Lock"
Keywords:  keypad, toggle, arrow, keyboard, pad
When Num Lock is on, the Numeric Keypad responds with numbers, as an adding machine. When Num lock is off, the Numeric Keypad responds as navigation keys using the alternate markings on the keys.
A key found on the numeric keypad of a computer keyboard that switches functions between numeric mode and cursor mode.
A key on the keyboard that toggles the Number Pad between arrow keys and number keys.