cooperator
Americannoun
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a person or organization that cooperates with another or others in some action, such as a venture or project.
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a person or organization that practices economic cooperation or participates in a cooperative.
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(often pejorative) a person who cooperates or collaborates with a hostile agency or force.
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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.
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They’ve got one cooperator, but you can cross-examine the cooperator, who’s cooperating in hopes of a more lenient sentence.
From Slate ● Jan. 7, 2026
At a hospital in Downey, the cooperator told police, he spoke by phone to Quintero.
From Los Angeles Times ● Oct. 10, 2025
"He is not a viable cooperator for the Fulton County D.A.,"
From Salon ● Feb. 27, 2024
While Wang is the first cooperator to take the stand, jurors have so far heard from three other witnesses.
From Reuters ● Oct. 6, 2023
Mr. Hale had acted, up to this time, earnestly with Noyes and Parris; and the letter shows that Mather had the sympathies and the interests of a cooperator with them, and in their "designs."
From Salem Witchcraft and Cotton Mather A Reply by Upham, Charles Wentworth
“Is his case just gonna be based on the testimony of sources and cooperators, which is pretty much what it was in President Hernandez’s case?”
From Los Angeles Times ● Jan. 5, 2026
Some models were designed to create a vortex, which, through its shear pattern, localized cooperators within a ring while pushing cheaters to the outer rim of the environment -- essentially localizing cooperation.
From Science Daily ● Feb. 6, 2024
Former FBI assistant director Frank Figliuzzi suggested that "there are multiple cooperators" in the documents case because the indictment references two people's conversations.
From Salon ● Jul. 28, 2023
As a woman in the male-dominated crypto industry, Ms. Ellison may appear more sympathetic to the jury than the other cooperators, lawyers familiar with the case said.
From New York Times ● Jul. 20, 2023
If it is our duty to act as "cooperators with the Creator" to bring children into the world, it is difficult to say at what point our behavior is "unnatural."
From The Pivot of Civilization by Sanger, Margaret
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
