cross-departmental; cross-functional
Used in business or organizational contexts to describe activities, teams, or initiatives that span multiple departments or functional areas.
A cross-departmental project team was launched.
Through cross-functional efforts, interdepartmental cooperation was strengthened.
Similar meaning, but 部門横断 explicitly refers to crossing departmental boundaries, while 組織横断 can imply crossing entire organizational units or functions.
Compound of 組織 (organization) and 横断 (crossing, traversing). The exact historical derivation is uncertain, but the term follows a common pattern for describing cross-boundary activities in modern Japanese.