as in marginal
located at or near a border
a frontier town with a reputation for vice and lawlessness
Synonyms & Similar Words
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Antonyms & Near Antonyms
1
as in border
a region along the dividing line between two countries
the Apaches were once feared on both sides of the U.S.-Mexico frontier
Synonyms & Similar Words
2
as in countryside
a rural region that forms the edge of the settled or developed part of a country
Alaska has been called America's last frontier
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Example Sentences
Examples are automatically compiled from online sources to
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Recent Examples of frontier
Charlie Campbell,
Time,
11 Dec. 2025
Lucas Laursen,
IEEE Spectrum,
2 July 2026
Even after losing his son to the sea, Edwin Link continued work on the ocean frontier until his death in 1981.
—
Bill Gourgey,
Popular Science,
2 July 2026
See All Example Sentences for frontier
Adjective
That worried Huang, who fears a Chinese rival, and White House officials, who believe Chinese dependence on non-frontier American chips is the best way to ensure a lead in AI.
—
Charlie Campbell,
Time,
11 Dec. 2025
Noun
Chip packages are growing larger and more complex as manufacturers scramble to keep up with the memory and processing demands of today’s frontier AI models.
—
Lucas Laursen,
IEEE Spectrum,
2 July 2026
Even after losing his son to the sea, Edwin Link continued work on the ocean frontier until his death in 1981.
—
Bill Gourgey,
Popular Science,
2 July 2026
See All Example Sentences for frontier
Recent Examples of Synonyms for frontier
Adjective
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The area is under a marginal risk (Level 1 of 5) of severe weather.
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To be sure, the effect is uneven as some very cold places may see modest benefits from marginal warming, at least up to a point.
Noun
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The bears seen in large urban centers and agricultural areas, like the southeastern corners of the state and parts of the western border, are generally transient, as those areas don't have enough woods to create a good habitat.
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Today, they're celebrated not just for their thrift, but for proving that small cars can have enormous personality – a trait Honda is now hoping will resonate far beyond Japan's borders.
Noun
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Kober, who has been married for more than 75 years, was born in east London before he and his siblings were evacuated to the countryside during World War II.
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Somehow magically, someone created an outdoor garden at a lush countryside retreat.
Noun
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Leiter said the final destination of the framework is peace between the two countries.
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Many countries and global organizations have pledged support and aid.
Noun
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Fully restored to its original glory, the mansion is located on the banks of the backwaters of Kerala, and is only accessible by boat from the mainland.
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The movie goes from this weird, seedy love motel to the industrial backwaters, and these long walks and talks down empty streets.
Noun
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In Beach Enclave’s hinterland, there are plenty of enjoyable distractions, including a 4,500-square-foot golf complex, with putting green, courts for tennis, padel, and pickleball, fitness center, and games lounge.
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The menu is top-tier and uses as much local produce from the ocean and nearby hinterland as possible.
Noun
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For experienced trekkers looking for quick escapes (expert) These backpacking sites offer backcountry adventures for those with the time and the right gear.
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Where to Stay The park has two campgrounds, Cedar Pass and Sage Creek, but visitors can also opt for backcountry camping.
Noun
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Many hedges, bushes, and trees can block sight lines, so even the nosiest of neighbors will be forced to mind their own business.
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These wonders can grow as strange, twisted bushes or as giant, spindly trees.
Cite this Entry
“Frontier.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/frontier. Accessed 5 Jul. 2026.
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