party

A social gathering especially for pleasure or amusement.

A group of people who have gathered to participate in an activity.

A group of soldiers selected for a duty or mission.

An established political group organized to promote and support its principles and candidates for public office.

A person or group involved in an enterprise; a participant or accessory.

A person or entity that participates in a transaction, makes a contract, or is involved in a lawsuit as a litigant.

A subscriber to a telephone party line.