nonparty

adj

1. (not-comparable)Not a party (social gathering), or not related to parties or partying.

   “Subsequent albums of nonparty songs and metal-like ballads have not been nearly as successful, but 20-something truth-seekers are not made for stasis.”

2. (not-comparable)Not a party (involved person or entity), or unrelated to a party.

noun

1. One who is not a party.

   “Juries may not, however, use punitive damages to punish a defendant directly for harms that the defendant visited on nonparties.”