expression, godan verb (-mu)
set type; compose type
Refers to the traditional printing process of arranging movable type for printing. Used in historical or technical contexts.
昔の印刷所では、職人が活字を組んでページを作っていた。
In old printing houses, craftsmen set type to create pages.
Compound of 活字 (movable type) + を + 組む (to assemble). Literally 'to assemble type'.