The phrase "multiple departments" refers to more than one branch or division within an organization or company. It means that there are different areas or sections, each with its own responsibilities and functions. Full definition
A report in The Information claims the job cuts are expected to affect between 80 and 160 people across multiple departments out of its strong 1,600 — work force. (indianexpress.com)
Extensive experience collaborating with multiple departments including accounting, billing, HR, shipping, receiving, sales and technology. (resume-resource.com)
Knowing the ins and outs of multiple departments at your company can only serve you well, especially if you ever want to work in one of those fields. (monster.com)