1
: a situation in which people work together to do something
The report cited a lack of cooperation between state and local officials.
The fair was organized in cooperation with local businesses. = The fair was organized with the cooperation of local businesses.
2
: the actions of someone who is being helpful by doing what is wanted or asked for
Thank you for your cooperation.
We are asking for your full cooperation.
Cite this Entry
“Cooperation.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/cooperation. Accessed 21 Jun. 2026.
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