Lewis Short
adventor (noun M) : advenio
* One that arrives, a guest, visitor.
* In gen., Plaut. As. 2, 2, 92.—So in two inscriptions, Orell. 2287, and Grut. 444, 8; cf. Barth. Adv. p. 1487.
* Esp., one that comes to a pothouse, visitor, customer, Plaut. Truc. 1, 2, 2: adventores meos non incuses,id. ib. 2, 7, 55, etc.; so App. M. 10, p. 248.
Charlton T. Lewis, Charles Short, A Latin Dictionary