Party  —n. (pl. -ies) 1 social gathering, usu. Of invited guests. 2 people working or travelling together (search party). 3 political group putting forward candidates in elections and usu. Organized on a national basis. 4 each side in an agreement or dispute. 5 (foll. By to) law accessory (to an action). 6 colloq. Person. —v. (-ies, -ied) attend a party; celebrate. [romanic: related to *part]