noun
out-of-store sales department; outside sales department
A department within a company that handles sales activities conducted outside the store or office, such as door-to-door sales or client visits.
彼は外商部に配属されて、毎日外回りをしている。
He was assigned to the outside sales department and is out making rounds every day.
営業部 is a general sales department, while 外商部 specifically handles sales outside the company premises.
Compound of 外 (outside), 商 (commerce), and 部 (department).