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frontier
/frən'tir/
Synonyms of frontier Antonyms of frontier Examples of frontier Usage of frontier Parts of frontier Definition that contains frontier Words sounding like frontier Explanation of frontier

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Definitions of frontier
  1. noun
    an international boundary or the area (often fortified) immediately inside the boundary
    type of:
    boundary bounds bound
  2. noun
    an undeveloped field of study; a topic inviting research and development
    "he worked at the frontier of brain science"
  3. noun
    a wilderness at the edge of a settled area of a country
    "the individualism of the frontier in Andrew Jackson's day"
    type of:
    wild wilderness
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