Lewis Short
(verb) : prae-vŏlo, āvi, 1
* To fly before or in advance (class.): grues in tergo praevolantium colla et capita reponunt,Cic. N. D. 2, 49, 125: aquila velut dux viae praevolavit,Tac. H. 1, 62 (but the correct read., Plaut. Mil. 1, 1, 41, is praeolat, v. praeolo).
Charlton T. Lewis, Charles Short, A Latin Dictionary