type and blocks assembled in pages and imposed in a metal chase ready for printing.
A complete typesetting, assembled into pages and secured, ready for printing.
(old) type matter or type and block with its accompanying spacing material secured in the forme called a chase.
The type-pages as imposed to print one side of a sheet. The outer forme refers to the convex side of a printed sheet. The inner forme is on the concave side. The forme is an important unit of bibliographical analysis because any single piece of type can only occur once in a forme. In a folio, each forme consists of two type-pages imposed adjacently.
In printing, one side of assembled pages or other images for printing. In die-cutting, the wooden board in which the cutting, creasing and perforating rules are mounted.