Thesaurus: frontiers
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 developme…
Related headwords
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Definitions
- 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