frontier
fruhn tir
- n a wilderness at the edge of a settled area of a country
the individualism of the frontier in Andrew Jackson's day - n an international boundary or the area (often fortified) immediately inside the boundary
- n an undeveloped field of study; a topic inviting research and development
he worked at the frontier of brain science
- The Panamanian response to the Italian press's declaration that Italy's frontier is Panama was a messy "frontier" incident.
- The historian forecast the end of the American frontier and then he died.