Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An international border.
  • n. The area along an international border.
  • n. A region just beyond or at the edge of a settled area.
  • n. An undeveloped area or field for discovery or research: theories on the frontier of astrophysics.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. That part of a country which fronts or faces another country or an unsettled region; the marches; the border, confine, or extreme part of a country, bordering on another country; the border of the settled and cultivated part of a country; as, the frontier of civilization.
  • adj. Lying on the exterior part; bordering; conterminous.
  • adj. Of or relating to a frontier.

from the GNU version of the Collaborative International Dictionary of English

  • n. That part of a country which fronts or faces another country or an unsettled region; the marches; the border, confine, or extreme part of a country, bordering on another country; the border of the settled and cultivated part of a country.
  • n. An outwork.
  • adj. Lying on the exterior part; bordering; conterminous.
  • adj. Of or relating to a frontier.
  • intransitive v. To constitute or form a frontier; to have a frontier; -- with on.

from The Century Dictionary and Cyclopedia

  • n. That part of a country which fronts or faces another country; the confines or extreme part of a country bordering on another country; the marches; the border.
  • n. That part of a country which forms the border of its settled or inhabited regions: as (before the settlement of the Pacific coast), the western frontier of the United States.
  • n. A fort; a fortification.
  • n. The front or bordering part of anything, as the forehead.
  • n. Antagonistic or insolent bearing or aspect. [The sense of the word in the following passage is disputed.
  • n. Synonyms Border, Confine, etc. See boundary.
  • Of or pertaining to a frontier; lying on the border or exterior part; bordering: as, a frontier town.
  • Fronting; opposite.
  • To form or constitute a frontier; possess territories bordering on or constituting a frontier: with on or upon.
  • To place on the frontier; border.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. an undeveloped field of study; a topic inviting research and development
  • n. a wilderness at the edge of a settled area of a country
  • n. an international boundary or the area (often fortified) immediately inside the boundary

Etymologies

Middle English frountier, from Old French frontier, from front, forehead, front; see front.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Old French fronter (whence Modern French frontière), from front. (Wiktionary)

Examples

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.

  • Clever crossword clue "back to front?" for "ier" entry.

    May 1, 2013