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Noun: frontier  ,frún'teer or 'frún,teer
  1. A wilderness at the edge of a settled area of a country
    "the individualism of the frontier in Andrew Jackson's day"
  2. An international boundary or the area (often fortified) immediately inside the boundary
  3. An undeveloped field of study; a topic inviting research and development
    "he worked at the frontier of brain science"

Derived forms: frontiers

Type of: bailiwick, bound, boundary, bounds, discipline, field, field of study, study, subject, subject area, subject field, wild, wilderness

Encyclopedia: Frontier, North Dakota