Unruled
Unruled is an adjective used to describe something that is not governed by rules or not marked by lines, depending on context. In stationery and publishing, unruled refers to pages without lines, grids, or margins. Unruled paper is commonly used for drawing, freehand writing, or sketching, and it contrasts with ruled, dotted, or gridded formats.
In geometry, unruled describes a surface that contains no straight line lying entirely on the surface. A
Usage notes: the term is specialized and most often found in mathematics, geometry texts, or technical descriptions.