partypar·ty /ˈpɑːtiˈpɑːrti/ noun (plural parties) [countableC]1LAW the people or group of people involved in a legal case, argument, agreement etcIt is difficult to obtain a ruling from the court if the other party contests (=officially disagrees with) the decision.
copies of relevant correspondence between the parties
2third partyLAW when two people are involved in a legal case, a third party is anyone who is not directly involved but might be affected by itTouche Ross was criticised for not allowing third parties to see their report.
Switch from comprehensive tothird party insurance (=insurance covering anyone affected by an accident, as well as the person who takes out the insurance) if your car’s value has fallen.
3an organization whose members share the same political beliefs and aims and which tries to get elected to government. The word ‘party’ is often used in the name of the organizationIndia’s Bharatiya Janata Party
→ see also concert party, working party