frontier

noun
fron·​tier | \ ˌfrən-ˈtir How to pronounce frontier (audio) , ˈfrən-ˌtir, frän-ˈtir, ˈfrän-ˌtir How to pronounce frontier (audio) \

Definition of frontier

1a : a border between two countries the frontier between Canada and the U.S.
b obsolete : a stronghold on a frontier
2a : a region that forms the margin of settled or developed territory were sent on an expedition to explore the western frontier
b : the farthermost limits of knowledge or achievement in a particular subject frontiers in immunology
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 … the brain lies before us as one of the last scientific frontiers here on earth.— Robert Klitzman

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Other Words from frontier

frontier adjective

Synonyms for frontier

Synonyms

border, borderland, march

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Examples of frontier in a Sentence

the frontier between Canada and the U.S. They were sent on an expedition to explore the western frontier.

Recent Examples on the Web

Cerebral Mercury enters Aries on Wednesday, April 17, putting more of your mental focus on the home frontier. Randon Rosenbohm, Allure, "What April’s Capricorn Horoscope Means for You," 31 Mar. 2019 Chef Amos Watts, raised in Nebraska, land of the corn-fed, has taken to the new old-beef frontier with the zeal of a convert. Matthew Kronsberg, WSJ, "The Secret to This Dish's Deep Flavor," 18 Oct. 2018 By July 1871, the army’s strength stood at only 30,000, with most of those posted to the Western frontier; only 4,300 soldiers were on duty in posts in the South, and even then, mostly in major port or railroad cities. Allen C. Guelzo, Time, "Reconstruction Didn't Fail. It Was Overthrown," 30 Apr. 2018 The two sides are still poles apart in key areas, in particular how to avoid a border emerging on the divided island of Ireland when Northern Ireland becomes home to the U.K.’s land frontier with the EU. Bloomberg.com, "Bloomberg," 8 Mar. 2018 Unlike other Venezuelans who cross the border and jump on buses bound for Ecuador, Perú or Chile, where work permits are easier to get, Gordillo sticks close to the frontier, within view of Venezuela’s mountains. Jim Wyss, miamiherald, "As Venezuela crumbles, a mother makes a desperate journey to save her daughter," 16 Feb. 2018 Yesterday's thrilling Apple event at the Steve Jobs Theater in Cupertino, California revealed the new frontier of iPhones. Araceli Cruz, Teen Vogue, "iPhone X No Longer Available on Apple’s Website," 13 Sep. 2018 The science questions the team is tackling really push the frontier of what NASA can do in both remote and in situ optical ocean research. Chris Ciaccia, Fox News, "The ocean's 'Twilight Zone' is affecting Earth's climate," 15 Aug. 2018 Population collapse From about 1400 to 1532, the Quijos Valley marked the eastern frontier of the Incan Empire. Kiona N. Smith, Ars Technica, "Supposedly pristine South American forest had been pre-Columbian farmland," 17 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'frontier.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of frontier

15th century, in the meaning defined at sense 1a

History and Etymology for frontier

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

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Statistics for frontier

Last Updated

10 May 2019

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Time Traveler for frontier

The first known use of frontier was in the 15th century

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More Definitions for frontier

frontier

noun

English Language Learners Definition of frontier

: a border between two countries
: a distant area where few people live
: the limits of knowledge in a particular field

frontier

noun
fron·​tier | \ ˌfrən-ˈtir How to pronounce frontier (audio) \

Kids Definition of frontier

 (Entry 1 of 2)

1 : a border between two countries
2 : the edge of the settled part of a country

frontier

adjective

Kids Definition of frontier (Entry 2 of 2)

: of, living in, or situated in the frontier frontier towns frontier families

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