Also found in: Thesaurus, Idioms, Wikipedia.


intr.v. co·op·er·at·ed, co·op·er·at·ing, co·op·er·ates
1. To work or act together toward a common end or purpose.
2. To acquiesce willingly; be compliant: asked the child to cooperate and go to bed.
3. To form an association for common, usually economic, benefit: When buyers cooperate, they can make large wholesale purchases at a discount.

[Late Latin cooperārī, cooperāt- : Latin co-, co- + operārī, to work (from opus, oper-, work; see op- in Indo-European roots).]

co·op′er·a′tor n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cooperator - an associate in an activity or endeavor or sphere of common interest; "the musician and the librettist were collaborators"; "sexual partners"
associate - a person who joins with others in some activity or endeavor; "he had to consult his associate before continuing"
bridge partner - one of a pair of bridge players who are on the same side of the game
dancing partner - one of a pair of people who dance together
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Randy Parmley from the Ottawa County Conservation District was awarded the Outstanding Conservation District Cooperator award.
Khashoggi's killing has severely strained ties between Turkey and Saudi Arabia, although Turkish President Tayyip Erdogan has good ties with the Saudi monarch, King Salman.Erdogan has said Khashoggi's killing was ordered by the highest level of Saudi leadership and has repeatedly called on Saudi officials to identify a "local cooperator" involved in thekilling.
The Fall trade show is the autumnal counterpart to The Cooperator's Spring Expo, an industry fixture that has drawn hundreds of vendors, service providers, industry professionals, and attendees from all over the five boroughs for nearly 30 years.
In what follows (but not in the subject instructions, which avoid such terms) we refer to a subject who chooses XX (YY) as a cooperator (defector), or occasionally XX- (YY-) chooser.
If a cooperator is engaged with a defector in an interpersonal dispute, then he or she is generally at disadvantage compared to the opponent as selfish opponents can take a full advantage of their resources.
A farmer who wants to be a cooperator should own an easily accessible farm land with an adequate water source.
(Hunters took a record 1,864 bears in 2003 and 1,478 in 2009.) Last year, more than 600 bear hunters participated in the NYS Black Bear Cooperator Patch Program, in which hunters report their bear harvest to DEC in exchange for a cooperator patch and letter informing them of their bear's age.
According to the Law and the Regulation, a gaming promoter or a VIP-room contractor must be licensed before beginning business (Article 23(1)) while a cooperator or customer representative is not required to apply for a license.
In this paper, a relative cooperator density [[rho].sub.c]/[rho] is calculated and used to characterize the macroscopic behaviors of the system.
During the course of the investigation, the documents show that Habibion and Motamedian told an undercover government cooperator to lie to US law enforcement officials about the transactions.
"pay" the cooperator (entity or individual person) a bounty