a social gathering of invited guests, typically involving eating, drinking, and entertainment

an engagement party

a formally constituted political group that contests elections and attempts to form or take part in a government

draft the party's election manifesto

a person or people forming one side in an agreement or dispute

a contract between two parties

enjoy oneself at a party or other lively gathering, typically with drinking and music

put on your glad rags and party!

divided into parts of different tinctures

party per fess, or, and azure