Longman Dictionary of Contemporary English
interdepartmental
adjective
EXAMPLES FROM OTHER ENTRIES
▪ The college's interdepartmental mail system is extremely efficient.
Douglas Harper's Etymology Dictionary
interdepartmental
also inter-departmental, 1861, from inter- + departmental.
Wiktionary
interdepartmental
a. 1 between departments; to do with the connection of departments. 2 involve multiple departments; multidepartmental.
WordNet
interdepartmental
adj. between or among departments; "interdepartmental competition" [ant: intradepartmental]
adv. between departments; "this memo was circulated interdepartmentally"
Usage examples of "interdepartmental".
This was an unofficial, ad hoc group whose agenda memos and daybooks showed they were meeting to discuss better methods of interdepartmental communication, which in fact they had discussed for about two minutes.