frontiers is frontier's Plural Form

frontier

US [frʌnˈtɪr]
UK [frʌnˈtɪə(r)]
  • n.边界;边疆;边地;〈美〉边疆城市
  • adj.边疆的;新垦地的
  • Web边境;前沿;边域
Plural Form:frontiers  
n.
1.
边疆;边界,边缘
2.
新开辟地,边地;〈美〉边疆城市
3.
(知识等的)尚待开发的领域
adj.
1.
边疆的
2.
新垦地的,边地的

Sample Sentence

Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard
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