what is....?

A party is a gathering of persons who have been invited by a host for the purposes of socializing, conversation, and recreation. A party will typically feature eating and drinking, and often music and dancing as well.
Some parties are held in honor of a specific person, day, or event. Parties of this kind are often called celebrations.
A party is not necessarily a private occasion. Public parties are sometimes held in pubs and bars, and people attending such parties may be charged an admission fee by the host.
thanks wiki