Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun An international border.
  • noun The area along an international border.
  • noun A region just beyond or at the edge of a settled area.
  • noun An undeveloped area or field for discovery or research.

from The Century Dictionary.

  • To form or constitute a frontier; possess territories bordering on or constituting a frontier: with on or upon.
  • To place on the frontier; border.
  • noun 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.
  • noun 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.
  • noun A fort; a fortification.
  • noun The front or bordering part of anything, as the forehead.
  • noun Antagonistic or insolent bearing or aspect. [The sense of the word in the following passage is disputed.
  • noun 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.

from the GNU version of the Collaborative International Dictionary of English.

  • intransitive verb obsolete To constitute or form a frontier; to have a frontier; -- with on.
  • adjective Lying on the exterior part; bordering; conterminous.
  • adjective Of or relating to a frontier.
  • noun 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.
  • noun (Fort.), obsolete An outwork.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun 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.
  • adjective Lying on the exterior part; bordering; conterminous.
  • adjective Of or relating to a frontier.

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

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

Etymologies

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

[Middle English frountier, from Old French frontier, from front, forehead, front; see front.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Old French fronter (whence Modern French frontière), from front.

Examples

Comments

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

    May 1, 2013