rover

rover is a Noun

Definition:

[1] One who practices robbery on the seas; a pirate. Yet Pompey the Great deserveth honor more justly for scouring the seas, and taking from the rovers 846 sail of ships. Holland.

[2] One who wanders about by sea or land; a wanderer; a rambler.

[3] Hence, a fickle, inconstant person.

[4] A ball which has passed through all the hoops and would go out if it hit the stake but is continued in play; also, the player of such a ball.

[5] Casual marks at uncertain distances. Encyc. Brit.

[6] A sort of arrow. [Obs.] All sorts, flights, rovers, and butt shafts. B. Jonson. At rovers, at casual marks; hence, at random; as, shooting at rovers. See def. 5 (a) above. Addison. Bound down on every side with many bands because it shall not run at rovers. Robynson (More`s Utopia).