rando UK /ˈɹændəʊ/US /ˈɹændoʊ/noun 4adjective 2forms 3 noun4 •(informal) An arbitrary person with whom one has no shared social connection.I accidentally took some rando's luggage from the airport carousel. •(informal, disapproving) A person going to a party without being invited. •(informal) Anything selected at random. •(informal) Clipping of randomizer (“mod that randomizes”). adjective2 •(informal) Random; arbitrary. •Pertaining to randonnée or uphill skiing. formsrandos · more rando · most rando