1. a person who lives on or is familiar with plains, especially the Great Plains of North America

Examples

• The old plainsman knew every water source for miles around.
• Buffalo Bill was a famous plainsman of the American West.
• The plainsman guided the wagon train across the vast prairie.
• As a skilled plainsman, he could read the weather by watching the grass.
• The plainsman’s knowledge of the terrain proved invaluable to the expedition.
• Many plainsmen worked as cattle ranchers in the late 1800s.