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.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a gadget; dingus; thingumbob.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a stew of meat, vegetables, potatoes, etc.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
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)