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interdepartmental

American

[in-ter-dee-pahrt-men-tl, -di-pahrt-] / ˌɪn tərˌdi pɑrtˈmɛn tl, -dɪ pɑrt- /

adjective

involving or existing between two or more departments.

interdepartmental rivalry.

interdepartmental British

/ ˌɪntəˌdiːpɑːtˈmɛntəl /

adjective

of, relating to, or conducted between two or more departments

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

interdepartmentally

adverb

Etymology

Origin of interdepartmental

First recorded in 1890–95; inter- + departmental ( def. )

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

interdepartmental

They sent me an email that was not even to me — it was this interdepartmental thing.

From Los Angeles Times ● Apr. 3, 2026

Authorities have set up an interdepartmental investigation task force to look into the cause of the blaze.

From Barron's ● Nov. 30, 2025

The ask, spelled out in an interdepartmental memo: something live from New York for a young audience.

From The Wall Street Journal ● Nov. 3, 2025

The report will form the basis of recommendations by an interdepartmental working group and a survivors' reference group to the first and deputy first ministers.

From BBC ● Feb. 12, 2025

Palace revolutions, interdepartmental revolutions, are a different matter.

From Public Opinion by Lippmann, Walter

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023