From Longman Dictionary of Contemporary Englishconspiracycon‧spi‧ra‧cy /kənˈspɪrəsi/●くろまる○しろまる○しろまる noun (plural conspiracies) [countable, uncountable]1PLANa secret plan made by two or more people to do something that is harmful or illegal → conspireconspiracy to do somethingHe was charged with conspiracy to commit criminal damage.conspiracy againsta conspiracy against the governmentThere were many conspiracy theories (=beliefs that something is the result of a conspiracy) surrounding Princess Diana’s death.► see thesaurus at plan2 →conspiracy of silenceCOLLOCATIONSadjectivesan international/worldwide/global conspiracyHitler believed there was a worldwide conspiracy to enslave Germany.a criminal conspiracyHis crimes were illegal possession of arms and criminal conspiracy.a political conspiracyWere the killings part of a political conspiracy?an alleged conspiracy (=that people say exists but that is not yet proved to exist)The charges against him relate to an alleged conspiracy.verbsbe part of a conspiracy (also take part in a conspiracy)The jury found that Poindexter was part of a conspiracy to ship arms to Iran.be involved in a conspiracyApparently the commander of the army had also been involved in the conspiracy.be charged with conspiracy (=be formally accused of it)The women were charged with conspiracy to supply heroin.be convicted of conspiracy (=be found guilty of it in a court)He was convicted of conspiracy to carry out terrorist acts.conspiracy + NOUNa conspiracy theory (=a belief by a number of people that something is the result of a conspiracy)President Kennedy’s assassination inspired a lot of conspiracy theories.a conspiracy theorist (=someone who believes in a particular conspiracy)Conspiracy theorists believe that Princess Diana’s death was not an accident.a conspiracy charge/charge of conspiracyThree men have been convicted on fraud and conspiracy charges.Examples from the Corpusconspiracy• Being something of a conspiracybuff, I believe this deal has been in the offing for quite some time.• There was a conspiracy to defraud the company of millions of dollars.• But how this complaint lines up with the allegedconspiracy and fraudulentconduct is not clear to me.• He was entranced by his own thoughts, and dazzled by the elegantsimplicity of his conspiracytheories.• The charges included racketeering, conspiracy, bankfraud, securities fraud, misapplication of funds and interstatetransportation of stolenproperty.• Reynolds was charged with conspiracy against the government.conspiracy theories• These people have enough conspiracy theories on their plates.• Like all good conspiracy theories, the poliovaccine theory's originators are its worstenemies.• Swanson knows his conspiracy theories, and his portrait of Dallas, mainly rancid, saves you the trip.• He was entranced by his own thoughts, and dazzled by the elegant simplicity of his conspiracy theories.• Both events ended in deaths, and, presumably, fueled a thousand conspiracy theories in the heartland.• The air is thick with conspiracy theories whenever the regime feels threatened.From Longman Business Dictionaryconspiracycon‧spi‧ra‧cy /kənˈspɪrəsi/ noun (plural conspiracies) [countable, uncountable]a secret plan that is made by two or more people to do something harmful or illegalconspiracy to do somethingAll three men were charged with conspiracy to defraud.a conspiracy against something/somebodyThe company appears to be looking for proof of an industry-wide conspiracy against it.