in·ter·de·part·men·tal /ˌɪntəˌdiːpɑːtˈmentl $ ˌɪntərdɪˌpɑːrtˈmentl/ adjectiveadj [usually before noun] BETWEENbetween or involving different departments of a company, government etc 〔公司、政府等〕部门之间的，牵涉不同部门的 intense interdepartmental rivalry 部门之间的激烈竞争
interdepartmental• The college's interdepartmental mail system is extremely efficient.