Glossary Term Definition
The outer vertical edge of a page, opposite the spine or binding edge; the margin along this edge is called the fore-edge margin.
Definition
The outer vertical edge of a page, opposite the spine or binding edge. The margin along this edge is called the fore-edge margin. In traditional page layout, the fore-edge margin is typically wider than the back (gutter) margin but narrower than the foot margin.
Source
No access — Robert Bringhurst — p. 324:
The outer vertical edge of a page, opposite the spine or binding edge.