Definitions for frontier

Overview of noun frontier

The noun frontier has 3 senses? (first 1 from tagged texts)

1. (1) frontier

(a wilderness at the edge of a settled area of a country; "the individualism of the frontier in Andrew Jackson's day")

2. frontier

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

3. frontier

(an undeveloped field of study; a topic inviting research and development; "he worked at the frontier of brain science")