frontier

play
noun fron·tier \ˌfrən-ˈtir, ˈfrən-ˌ, frän-ˈ, ˈfrän-ˌ\

Definition of frontier

  1. 1 a :  a border between two countries b obsolete :  a stronghold on a frontier

  2. 2 a :  a region that forms the margin of settled or developed territory b :  the farthermost limits of knowledge or achievement in a particular subject c :  a line of division between different or opposed things <the frontiers separating science and the humanities — R. W. Clark> d :  a new field for exploitative or developmental activity

frontier

adjective

Examples of frontier in a sentence

  1. the frontier between Canada and the U.S.

  2. They were sent on an expedition to explore the western frontier.

Origin and Etymology of frontier

Middle English fronter, from Anglo-French frountere, fronter, from front


First Known Use: 15th century


FRONTIER Defined for English Language Learners

frontier

play
noun fron·tier \ˌfrən-ˈtir, ˈfrən-ˌ, frän-ˈ, ˈfrän-ˌ\

Definition of frontier for English Language Learners

  • : a border between two countries

  • : a distant area where few people live

  • : the limits of knowledge in a particular field


FRONTIER Defined for Kids

1

frontier

play
noun fron·tier \ˌfrən-ˈtir\

Definition of frontier for Students

  1. 1 :  a border between two countries

  2. 2 :  the edge of the settled part of a country


2

frontier

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adjective fron·tier

Definition of frontier for Students

  1. :  of, living in, or situated in the frontier <frontier towns> <frontier families>



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