A frontiersman was a man who lived on the edge of the settled United States, especially in the 1800s, when that edge was still moving west. He hunted, farmed a little, knew the wild land, and lived far from towns. The word belongs to American history and to stories — Daniel Boone is the kind of person people mean. You still meet it in books and films about that time. It is not a job title anyone uses for a living person now, except as a colour word: someone rough, outdoor, and used to looking after himself. There is frontierswoman for a woman, but the old stories almost always say frontiersman.