frontier
Definition
- n. a wilderness at the edge of a settled area of a country
- 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
Word forms
- Plural
- frontiers
Example sentences
n.
The explorers traveled to the frontier in search of new lands.
法
The treaty established a clear frontier between the two nations.