ranger

1. One who ranges; a rover.
2. A keeper, guardian, or soldier who ranges over a region (generally of wilderness) to protect the area or enforce the law.
3. That which separates or arranges; a sieve.
4. A dog that beats the ground in search of game.
5. In some modern armies, an elite soldier, similar to special forces but often operating in larger units.
6. A warrior character, often with wilderness and stealth skill, who typically travels the countryside.
7. A character skilled in the use of ranged weapons.

verb

To work as a ranger.