collusion
A secret agreement between two or more people to defraud or deceive others or to accomplish an unlawful purpose.
Plain English
Collusion is when two or more people secretly agree to work together to cheat, defraud, or deceive someone else. It's a hidden conspiracy to do something wrong—maybe to fix prices, rig a lawsuit, or commit fraud. Collusion is illegal in many contexts, from antitrust law (where competitors collude to raise prices) to family law (where spouses might collude to hide assets in a divorce). The key element is the secret agreement and the intent to harm or deceive.
Example
Two construction companies secretly agreed to bid on a government contract at artificially high prices and split the work between them. This collusion violated antitrust laws and resulted in criminal charges.
Used in a sentence
“The prosecutor alleged collusion between the defendant and a witness to fabricate evidence.”
Related terms
This page is a plain-English reference and is not legal advice. Laws vary by jurisdiction and change over time. For specific situations consult a licensed attorney.