What is adjustment of type by spacing it so as to make it exactly fill a line, or of a cut so as to hold it in the right place; also, the leads, quads, etc., used for making such adjustment called?

justification — (Print.) Adjustment of type by spacing it so as to make it exactly fill a line, or of a cut so as to hold it in the right place; also, the leads, quads, etc., used for making such adjustment. (Webster's 1913.)