1. [syn: control key, command key]
WordNet (r) 3.0 (2006):
n 1: (computer science) the key on a computer keyboard that is
used (in combination with some other key) to type control
characters [syn: control key, command key]
The Free On-line Dictionary of Computing (30 December 2018):
A modifier key found on modern keyboards.
Holding down a control key while pressing and releasing letter
keys or certain other keys generates a "control character".
E.g. holding control and hitting "A" generates control-A (ASCII
code 1). The ASCII code for the control character is generally 64
less than that for the unmodified character.
Standard PC keyboards have two control keys, both labeled
"Ctrl", at the bottom left and bottom right of the main block of
The control key does not generate any character on its own but
most modern keyboards and operating systems allow a program
to tell whether each of the individual keys on the keyboard
(including modifier keys) is pressed at any time.