Frontier — synonyms, definition

1. frontier (Noun)

border borderline bound boundary breakthrough confine cutting edge edge end extent extremity fringe hinterland limit limitation outpost outskirts periphery

frontier (Noun) — A wilderness at the edge of a settled area of a country. ex. "the individualism of the frontier in Andrew Jackson's day"

frontier (Noun) — An international boundary or the area (often fortified) immediately inside the boundary.

frontier (Noun) — An undeveloped field of study; a topic inviting research and development. ex. "he worked at the frontier of brain science"

bailiwick bound boundary bounds discipline field field of study study subject subject area subject field wild wilderness Triple Frontier