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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: Merriam-Webster.com [home, info]
  2. frontier: Oxford Dictionaries [home, info]
  3. frontier: American Heritage Dictionary of the English Language [home, info]
  4. frontier: Collins English Dictionary [home, info]
  5. frontier: Vocabulary.com [home, info]
  6. frontier: Macmillan Dictionary [home, info]
  7. Frontier, frontier: Wordnik [home, info]
  8. frontier: Cambridge Advanced Learner's Dictionary [home, info]
  9. Frontier, 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(s), Frontier (TV series), Frontier (ballet), Frontier (banknotes), Frontier (disambiguation), Frontier (novel), Frontier (pinball), Frontier (supercomputer), Frontier, The Frontier (Chilean History), The Frontier (Hong Kong), The Frontier (novel), The Frontier (website): 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]

(Note: See frontiers for more definitions.)

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")

▸ Also see frontiers
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Phrases that include frontier:   last frontier, north-west frontier province, north west frontier province, north east frontier agency, production possibility frontier, more...

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