rando

Short definition from Wiktionary

Adjective

1. 1
   Random; arbitrary.
2. 2
   Pertaining to randonnée or uphill skiing.

Noun

1. 1
   An arbitrary person with whom one has no shared social connection.
2. 2
   An arbitrary person with whom one has no shared social connection: A person going to a party without being invited.
3. 3
   Anything selected at random.