/kəʊ-ˈlɪtɪɡәnt/ – Noun
Definition: 1. đồng nguyên đơn;
2. đồng bị đơn.
A more thorough explanation: A co-litigant is a party who is joined as a defendant or plaintiff in a legal action or lawsuit along with one or more other parties.
Example: The plaintiff and the defendant are co-litigants in the lawsuit.