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conspire against (something or someone)

To join together in force or combine in such a way as to foil or defeat someone or something. The wind and rain conspired against our plans for an outdoor barbecue. His two younger brothers conspired against him to have him removed from the head of the company.
See also: conspire

conspire with (one)

To plot or scheme with one. What are you kids whispering about back there? You better not be conspiring with each other! The president of the company conspired with his assistant to conceal all evidence of his crime.
See also: conspire

conspire with (someone) against (something or someone)

To join together in force or combine in such a way as to foil or defeat someone or something. I bet the CEO conspired with the head of HR against Tom. Why else would he have been removed from the company like that?
See also: conspire
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

conspire with someone (against someone or something)

 and conspire (with someone) against someone or something
to join with someone in a plot against someone or something else. The CEO conspired with the board of directors against the stockholders. Ed conspired with Sam against the plan.
See also: conspire
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
FullContact will integrate Conspire's technology to provide its cloud address book users with the ability to find key people outside their own address books in order to focus on expanding their networks and the strength of their professional relationships.
In addition to expanding access to its network, Conspire is now also the first ever crowd-sourced professional network with the addition of editable profiles.
Conspire and Relentless provide 99.9 percent ultraviolet protection and are certified to meet both the ANSI Z87.1+ standard for high-impact protection and the CSA Z94.3 standards.
[section] 846, provides that it is a violation to conspire to commit any of the crimes under Title 21, the U.S.
But demonstrating that Reagan's camp had the tendency and the motive to conspire does not prove it did.
His solicitor Cornelius McCarthy told the court: "He denies totally that he conspired with anyone and says there is no evidence that he did conspire with anyone."
So the Insiders, who conspire for a world without freedom, must obscure their global ambitions.
In Office (NYC), 2004, a model posing as an office worker seemingly caught unaware as she squats to retrieve a document conspires with Kern to reappropriate the pornographic situation, coolly reproducing it in an image that is closer to the sensibility of Pierre Klossowski than the snapshot neo-realism of wild-boy lifestyle photography.