party
Noun
pl –ties
1. a social gath­er­ing for plea­sure
2. a group of peo­ple involved in the same activ­ity.
3. a group of peo­ple shar­ing a com­mon musi­cal aim
4. Infor­mal, humor­ous a per­son: he’s an odd old party
Verb
[-ties, –tying, –tied]
Infor­mal to cel­e­brate; have a good time. 

party definition

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.