1. in a manner involving secret agreement or cooperation between two or more parties to achieve a dishonest or fraudulent purpose
Usage: formal; typically used in legal or business contexts

Examples

• The two companies were accused of acting collusively to fix prices and eliminate competition.
• The executives collusively agreed to manipulate the bidding process.
• Investigators found that the officials had collusively concealed the financial records.
• The competitors collusively divided the market to avoid direct competition.
• They collusively orchestrated the scheme to defraud investors.