noun pl. parties -·ties

1. a group of people working together to establish or promote particular theories or principles of government which they hold in common; esp., an organized political group which seeks to elect its candidates to office and thus to direct government policies
2. any group of persons acting together; specif.,
   1. a group sent out on a task or mission a surveying party
   2. a group meeting together socially to accomplish a task a quilting party
   3. a group assembled for amusement or recreation a fishing party
3. a gathering for social entertainment, or the entertainment itself, often of a specific nature a birthday party, cocktail party
4. a person who participates or is concerned in an action, proceeding, plan, etc.: often with to to be a party to a conspiracy
5. either of the persons or sides concerned in a legal matter
6. Informal a person the party who telephoned

Etymology: ME partie < OFr < partir, to divide < L partiri < pars, part

adjective

1. of or having to do with a political party a party leader
2. for a social gathering party clothes

intransitive verb partied -·tied, partying -·ty·ing

1. ☆ to attend or hold social parties
2. Informal to take part in social activity, as at a party, in an unrestrained, often boisterous manner, usually while drinking alcoholic beverages, taking drugs, etc.