| 1. | a horizontal bar on a typewriter keyboard that is depressed in order to resume typing one space to the right. |
| 2. | a horizontal bar on a computer keyboard that is depressed in order to move the cursor one space to the right or, often, to perform some function in a program. |
| space bar n. A bar at the bottom of the keyboard of a typewriter or computer that when pressed down introduces a horizontal space into text, as between words. |
space bar hardware
(Or "space key") The extra-wide key at the near edge of every keyboard that is used to enter a space character.
In some Graphical User Interfaces, the space bar can be used to select the current item where the context does not allow text entry, e.g. when the input focus is on a push button or tick box.
(2007-01-29)