frontier

1. Lying on the exterior part; bordering; conterminous.

- a frontier town

1. a wilderness at the edge of a settled area of a country

- the individualism of the frontier in Andrew Jackson's day

Definition categories: location, wild, wilderness

2. an international boundary or the area (often fortified) immediately inside the boundary

Definition categories: location, bound, boundary, bounds

3. an undeveloped field of study; a topic inviting research and development

- he worked at the frontier of brain science

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