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We found 35 dictionaries with English definitions that include the word frontier:
Click on the first link on a line below to go directly to a page where "frontier" is defined.

General dictionaries General (29 matching dictionaries)
  1. frontier: Oxford Dictionaries [home, info]
  2. frontier: American Heritage Dictionary of the English Language [home, info]
  3. frontier: Collins English Dictionary [home, info]
  4. frontier: Vocabulary.com [home, info]
  5. frontier: Macmillan Dictionary [home, info]
  6. frontier: Merriam-Webster's Online Dictionary, 11th Edition [home, info]
  7. Frontier, frontier: Wordnik [home, info]
  8. frontier: Cambridge Advanced Learner's Dictionary [home, info]
  9. Frontier: Wiktionary [home, info]
  10. frontier: Webster's New World College Dictionary, 4th Ed. [home, info]
  11. frontier: The Wordsmyth English Dictionary-Thesaurus [home, info]
  12. frontier: Infoplease Dictionary [home, info]
  13. Frontier, frontier: Dictionary.com [home, info]
  14. frontier: Online Etymology Dictionary [home, info]
  15. Frontier, frontier: UltraLingua English Dictionary [home, info]
  16. frontier: Cambridge Dictionary of American English [home, info]
  17. 'Frontier' (elm hybrid), Frontier(s), Frontier (American), Frontier (Code Lyoko episode), Frontier (U.S.), Frontier (album), Frontier (company), Frontier (computer game), Frontier (disambiguation), Frontier (elm hybrid), Frontier (grid computing platform), Frontier (mathematics), Frontier (pinball), Frontier (topology), Frontier, The Frontier (Chilean History), The Frontier (Hong Kong), The Frontier (disambiguation), The Frontier (film), The Frontier (movie), The Frontier: Wikipedia, the Free Encyclopedia [home, info]
  18. Frontier: Online Plain Text English Dictionary [home, info]
  19. frontier: Webster's Revised Unabridged, 1913 Edition [home, info]
  20. frontier: Rhymezone [home, info]
  21. Frontier: AllWords.com Multi-Lingual Dictionary [home, info]
  22. frontier: Webster's 1828 Dictionary [home, info]
  23. frontier: Free Dictionary [home, info]
  24. frontier: Mnemonic Dictionary [home, info]
  25. frontier: WordNet 1.7 Vocabulary Helper [home, info]
  26. frontier: LookWAYup Translating Dictionary/Thesaurus [home, info]
  27. frontier: Dictionary/thesaurus [home, info]

Art dictionaries Art (1 matching dictionary)
  1. FRONTIER: Shakespeare Glossary [home, info]

Business dictionaries Business (1 matching dictionary)
  1. frontier: Legal dictionary [home, info]

Computing dictionaries Computing (1 matching dictionary)
  1. frontier: Encyclopedia [home, info]

Science dictionaries Science (2 matching dictionaries)
  1. Frontier: Eric Weisstein's World of Mathematics [home, info]
  2. frontier: PlanetMath Encyclopedia [home, info]

Slang dictionaries Slang (1 matching dictionary)
  1. Frontier: Urban Dictionary [home, info]

Quick definitions from Macmillan (
American English Definition British English Definition

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Quick definitions from WordNet (frontier)

noun:  an undeveloped field of study; a topic inviting research and development ("He worked at the frontier of brain science")
noun:  an international boundary or the area (often fortified) immediately inside the boundary
noun:  a wilderness at the edge of a settled area of a country ("The individualism of the frontier in Andrew Jackson's day")

Word origin

Phrases that include frontier:   last frontier, north-west frontier province, production possibility frontier, flanks of a frontier, american frontier, more...

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