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


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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 Space is shaping up to be a new competitive frontier for cloud-service providers. Dina Bass,, "Microsoft Pushes Azure Cloud Services Into New Frontier: Space," 20 Oct. 2020 To marketers, the inches of cotton stretched across our mouths and noses amount to a rare new frontier in the logo-littered landscape of T-shirts and ball caps. Author: Emily Heil, Anchorage Daily News, "Bacon- and chicken-scented masks are here and, really, you shouldn’t be surprised," 20 Oct. 2020 Access to such procedures is something of a last frontier for LGBT health care. Meredith Cohn,, "With few specialists nationwide, Baltimore is becoming a destination for transgender surgeries," 15 Oct. 2020 Space is becoming a fertile frontier for businesses and governments alike. Robert Hackett, Fortune, "Russian and Chinese spacecrafts could collide in space junk super-spreader," 15 Oct. 2020 Frustrated by the dearth of information about how to aid dying, Berkeley’s Dr. Lonny Shavelson is gathering data to guide other physicians through this new, important and sorrowful clinical frontier. Lisa M. Krieger, Star Tribune, "Doctors seek life-ending drugs that smooth the way for the terminally ill," 1 Oct. 2020 Music labels have watched TikTok's status grow into a new frontier for the industry, as the app continues to launch careers and propel singles to No. 1 entries on the Hot 100. Billboard, "Mxmtoon Already Conquered the Internet — Now She's Aiming For Pop Stardom," 30 Sep. 2020 At the very least, this latest collection from Prada signals that a new frontier of computer visible conspicuous consumption has arrived. Max Lockie, Quartz, "Prada’s new designer is tailoring clothes for Zoom," 25 Sep. 2020 The show, set after the fall of the Empire, but before the rise of the First Order, follows around a bounty hunter (Pedro Pascal) seeking to eke out a living with his blasters and wits in a near-lawless frontier. Saeed Ahmed, CNN, "'The Mandalorian' Season 2 is (almost) here," 2 Sep. 2020

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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Time Traveler for frontier

Time Traveler

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

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Statistics for frontier

Last Updated

24 Oct 2020

Cite this Entry

“Frontier.” Dictionary, Merriam-Webster, Accessed 26 Oct. 2020.

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More Definitions for frontier


How to pronounce frontier (audio) How to pronounce frontier (audio)

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


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



Kids Definition of frontier (Entry 2 of 2)

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

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