Definition of "Party" :

noun: an occasion on which people can assemble for social interaction and entertainment

"He planned a party to celebrate Bastille Day."

noun: a group of people gathered together for pleasure

"She joined the party after dinner."

noun: an organization to gain political power

"In 1992 Perot tried to organize a third party at the national level."

noun: a band of people associated temporarily in some activity

"They organized a party to search for food."

noun: a person involved in legal proceedings

"The party of the first part."

verb: have or participate in a party

"The students were partying all night before the exam."