n (Industrial Relations & HR Terms) another name (esp US) for craft union
hor′izon′tal un′ion
n. a labor union organized by the skills or trades of its members rather than by industries. Compare vertical union.
Horizontal Union
Horizontal Union
A labor union representing all workers with a given skill set in a geographic area, regardless of the company for which they work. For example, a horizontal union may represent all the plumbers in town.