as in borders
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
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Recent Examples of frontiers
Australia’s hypersonic ambition Hypersonic flight, defined as speeds exceeding Mach 5, has become one of the most strategically important frontiers in aerospace and defense.
—
Kapil Kajal, Interesting Engineering, 3 Nov. 2025
Each of the Internet’s 7 Phases overcomes the limits of the previous phase, while also opening new frontiers.
—Mallik Tatipamula, IEEE Spectrum, 27 Oct. 2025
The four-day event, a summit that closes Thursday, is aimed at unlocking new frontiers of growth.
—Sofia Celeste, Footwear News, 27 Oct. 2025
Many are choosing to work in more flexible capacities for longer and viewing retirement less as a full stop and more as a transition to new frontiers, including philanthropy, advisory roles, and entrepreneurship.
—Alex Ohnona, Fortune, 22 Oct. 2025
And so [Anthropic] was interested in having an in-house prototyping team that figures out what these frontiers models can do.
—PC Magazine, 21 Oct. 2025
Designed to tackle one of the last frontiers of home robotics – efficient carpet care – the R2 uses advanced AI navigation to cover every corner of the home, promising to deliver a professional-grade clean with minimal human input.
—New Atlas, 13 Oct. 2025
Here’s how that research, pioneered more than 40 years ago, has led to new frontiers in modern physics, as well as 2025’s Nobel Prize in physics.
—Ethan Siegel, Big Think, 8 Oct. 2025
For the Bespoke Collective, this project also explored new frontiers, with our first-ever hand-painted Starlight Headliner.
—Matthew MacConnell, Forbes.com, 18 Sep. 2025
Kapil Kajal, Interesting Engineering, 3 Nov. 2025
Each of the Internet’s 7 Phases overcomes the limits of the previous phase, while also opening new frontiers.
—Mallik Tatipamula, IEEE Spectrum, 27 Oct. 2025
The four-day event, a summit that closes Thursday, is aimed at unlocking new frontiers of growth.
—Sofia Celeste, Footwear News, 27 Oct. 2025
Many are choosing to work in more flexible capacities for longer and viewing retirement less as a full stop and more as a transition to new frontiers, including philanthropy, advisory roles, and entrepreneurship.
—Alex Ohnona, Fortune, 22 Oct. 2025
And so [Anthropic] was interested in having an in-house prototyping team that figures out what these frontiers models can do.
—PC Magazine, 21 Oct. 2025
Designed to tackle one of the last frontiers of home robotics – efficient carpet care – the R2 uses advanced AI navigation to cover every corner of the home, promising to deliver a professional-grade clean with minimal human input.
—New Atlas, 13 Oct. 2025
Here’s how that research, pioneered more than 40 years ago, has led to new frontiers in modern physics, as well as 2025’s Nobel Prize in physics.
—Ethan Siegel, Big Think, 8 Oct. 2025
For the Bespoke Collective, this project also explored new frontiers, with our first-ever hand-painted Starlight Headliner.
—Matthew MacConnell, Forbes.com, 18 Sep. 2025
Recent Examples of Synonyms for frontiers
borders
Noun
-
The question of whether a developing country should keep or sell credits from projects in its borders creates a perverse incentive to lower their climate ambitions, Turner said.—
Tim McDonnell,
semafor.com,
11 Nov. 2025
-
We were stuck in Egypt on a medical trip when Hamas took over Gaza and Israel shut down all the enclave’s borders.—
Literary Hub,
Literary Hub,
10 Nov. 2025
Cite this Entry
“Frontiers.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/frontiers. Accessed 26 Nov. 2025.
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