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frontier

From Wiktionary

Pronunciation

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  • (UK) IPA (key): /ˈfrʌntɪə/ or /ˈfrɒntɪə/ or /ˈfrʌntjə/ or /ˈfrɒntjə/
  • (US) IPA (key): /frʌnˈtɪr/ or /frɑnˈtɪr/
  • (file)
  • Hyphenation: fron‧tier

Noun

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Singular
frontier

Plural
frontiers

  1. The frontier is part of a country that is next to another country.
  2. A frontier is an area where few or no people live.
    Many settlers were killed on the frontier during colonial days in America.
    Outer space is said to be the last frontier.