Definitionen
1.NounA group of businesses or nations that collude to limit competition within an industry or market."oil cartel; drug cartel"
2.NounA combination of political groups (notably parties) for common action.
3.NounA written letter of defiance or challenge.
4.NounAn official agreement concerning the exchange of prisoners.
5.NounA ship used to negotiate with an enemy in time of war, and to exchange prisoners.