The act of colluding; secret or dishonest agreement and cooperation between two or more parties.
From Latin 'collusio' (acting together, collusion), derived from 'colludere' (to play together, conspire). The '-tion' suffix creates abstract nouns from verbs.
Medieval church law developed the concept of 'collution' specifically to address situations where both parties colluded to defraud the church or evade ecclesiastical law—it's why the term appears so often in old legal and religious texts.
Complete word intelligence in one call. Free tier — 50 lookups/day.