What does colluder mean?
A colluder is someone who takes part in collusion — a secret agreement between two or more people to deceive others, break rules, or secure an improper advantage, often at the expense of a third party such as the public, customers, or competitors. The word is almost always pejorative: calling someone a colluder implies not mere cooperation but covert, dishonest plotting, whether in bid-rigging, price-fixing, electoral manipulation, or political scandal. It functions grammatically as a noun, with the plural "colluders," and belongs to a family that includes the verb "collude," the noun "collusion," and the adjective "collusive." Although less frequent than "collusion," the term is valuable precisely because it names the individual wrongdoer rather than the scheme itself, making it useful in legal reporting, investigative journalism, and political commentary where accountability must be pinned on specific people rather than abstract arrangements.
nounA person who colludes; one who secretly cooperates with others, especially in order to deceive or defraud a third party or to gain an unfair advantage.
- One who secretly cooperates with another person or party in order to deceive or defraud others, or to gain an illicit advantage.
"The investigation revealed that the contractor was a colluder in the scheme to inflate bids."
"Regulators accused the two firms of acting as colluders, quietly fixing prices for years."
"He refused to name his fellow colluders, even when offered immunity."
The standard plural follows regular English noun inflection; conspiracy contexts typically refer to multiple colluders acting together.
"The trial brought together several alleged colluders who had never met face to face."
"Colluder" is built from Latin roots meaning "to play together" — which makes the word itself a sly pun: conspirators are, literally, playing together against you.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of colluder
"Colluder" derives from the Latin verb "colludere," formed from "com-" (together) and "ludere" (to play), originally meaning to play or frolic together. In English, "collude" came to denote secret cooperation for fraudulent purposes, first attested around the early seventeenth century, with "collusion" entering English somewhat earlier from the same Latin source via French. The root "ludere" also gives English words such as "elude," "prelude," and "interlude," all sharing the underlying sense of playing or performing.
Related word forms
How colluder is actually used
"Colluder" carries strongly negative connotations of deceit and conspiracy, and it appears most often in legal, journalistic, and political contexts. It is considerably less common than the related noun "collusion"; writers frequently prefer phrases like "the parties to the collusion" over the agent noun. The plural is "colluders."
Easily confused with colluder
A collaborator works with others, often openly and legitimately (or in wartime, with an occupying enemy), while a colluder specifically conspires in secret and underhandedly.