Noun: frontier ,frún'teer or 'frún,teer
- An international boundary or the area (often fortified) immediately inside the boundary
"The disputed frontier between the two countries was heavily guarded"
- A wilderness at the edge of a settled area of a country
"the individualism of the frontier in Andrew Jackson's day"
- 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, ND