frontier
noun
fron·tier
| \ ËfrÉn-Ëtir
, ËfrÉn-Ëtir, frĂ€n-Ëtir, ËfrĂ€n-Ëtir
\
, ËfrÉn-Ëtir, frĂ€n-Ëtir, ËfrĂ€n-Ëtir
\
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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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
Neural interfaces offer a new frontier for treating conditions like dementia, paralysis, mental health conditions or obesity, according to the report. — Dominic Rech, CNN, "Brain implants could give governments and companies power to read your mind, scientists warn," 10 Sep. 2019 Now a team of Florida researchers is creating ways for future generations to appreciate the sites where man was launched to new frontiers through virtual reality. — Fox News, "Florida researchers use 3D technology to preserve space program history," 5 Aug. 2019 Southeast Asia not only offers new frontiers for streamers in terms of creators and content, but providers such as Netflix, which was launched across the region in 2015, are still only really taking root across the region. — Mathew Scott, The Hollywood Reporter, "Netflix's Strategy for Southeast Asian Originals Begins to Take Shape," 23 July 2019 Its spin rate is higher than any other curveball in the gameâ3,294 revolutions per minuteâwhich is both the secret to its success and a new frontier in hittersâ devastation. — SI.com, "Who Throws the Nastiest Breaking Ball in MLB?," 13 June 2019 The story quickens to its haunting endâif not to any new frontier. — The Economist, "TĂ©a Obrehtâs âInlandâ blends the supernatural and the old West," 15 Aug. 2019 Close out this segment of the tour with a trip to the final frontier: InnerSpace Brewing Company. — al.com, "24 Hours on the Downtown Huntsville Craft Beer Trail," 26 June 2019 Another deployment is going to the frontier with the United States to attend to migrants who have been returned to Mexico while their asylum claims are processed in U.S. courts. — Washington Post, "Mexico says Guard deployment beginning, forms migrant team," 12 June 2019 Intelligence officials in Washington said the territory controlled by the Islamic State in Afghanistan was not of strategic importance â much like Pakistanâs lawless frontier. — New York Times, "U.S. Military Calls ISIS in Afghanistan a Threat to the West. Intelligence Officials Disagree.," 2 Aug. 2019These 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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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
See the full definition for frontier in the English Language Learners Dictionary
frontier
noun
fron·tier
| \ ËfrÉn-Ëtir
\
\
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
adjectiveKids Definition of frontier (Entry 2 of 2)
: of, living in, or situated in the frontier
frontier towns frontier families
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