noun

1. A person or group of people constituting a particular side in a contract or legal action.

   “The contract requires that the party of the first part pay the fee.”

2. A person.

3. A group of people forming one side in a given dispute, contest etc.

Synonyms: bash, do, rave

verb

1. To celebrate at a party, to have fun, to enjoy oneself.

   “We partied until the early hours.”

2. To take recreational drugs.

3. To engage in flings, to have one-night stands, to sow one's wild oats.