(letterpress typography) A blank metal block used to fill short lines of type.
(printing slang) A joke used to fill long days of setting type.
(typography, phototypesetting and digital typesetting) A keyboardcommand which alignstext with the left or right margin, or centred between them. In combination, as quad left, quad right, or quad centre.
Verb
(letterpress typography, transitive, intransitive) To fill spaces in a line of type with quads. Also quad out.
To align text with the left or right margin, or centre it.