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
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Recent Examples of frontiers
The new business frontiers do not indicate a weakening in the AP’s standards of providing fast, accurate, non-biased news, leaders said.
—
David Bauder, Fortune, 6 Apr. 2026
Metaphorically, frontiers could exist everywhere, as the furthermost limit of human understanding.
—Literary Hub, 1 Apr. 2026
The frontiers of medicine But these cautions have not stemmed the appetite for the therapies.
—Will Stone, NPR, 31 Mar. 2026
And frontiers always have a certain intellectual charisma.
—Caleb Crain, Harpers Magazine, 24 Mar. 2026
These brave souls forged new frontiers for nation-states and planted the right flag for posterity.
—S.c. Stuart, PC Magazine, 18 Mar. 2026
Looking ahead, several frontiers remain for chemical rocketry.
—Lee Billings, Scientific American, 18 Mar. 2026
This mountainous corner of northern Pakistan has emerged as one of Asia’s most exciting new adventure frontiers, with international visits surging 121% in 2024.
—Mark Johanson, Time, 12 Mar. 2026
Putin’s expansionism is the latest iteration of Moscow’s longstanding foreign policy objectives, centered on pushing out frontiers to more defensible positions and reaffirming Russia’s status as a great power.
—Liam Denning, Bloomberg, 12 Mar. 2026
David Bauder, Fortune, 6 Apr. 2026
Metaphorically, frontiers could exist everywhere, as the furthermost limit of human understanding.
—Literary Hub, 1 Apr. 2026
The frontiers of medicine But these cautions have not stemmed the appetite for the therapies.
—Will Stone, NPR, 31 Mar. 2026
And frontiers always have a certain intellectual charisma.
—Caleb Crain, Harpers Magazine, 24 Mar. 2026
These brave souls forged new frontiers for nation-states and planted the right flag for posterity.
—S.c. Stuart, PC Magazine, 18 Mar. 2026
Looking ahead, several frontiers remain for chemical rocketry.
—Lee Billings, Scientific American, 18 Mar. 2026
This mountainous corner of northern Pakistan has emerged as one of Asia’s most exciting new adventure frontiers, with international visits surging 121% in 2024.
—Mark Johanson, Time, 12 Mar. 2026
Putin’s expansionism is the latest iteration of Moscow’s longstanding foreign policy objectives, centered on pushing out frontiers to more defensible positions and reaffirming Russia’s status as a great power.
—Liam Denning, Bloomberg, 12 Mar. 2026
Recent Examples of Synonyms for frontiers
borders
Noun
-
Beyond the country's borders, Los Choneros has forged ties with powerful transnational networks, including Mexico's Sinaloa cartel and criminal groups from Albania, enabling it to play a role in global drug trafficking routes.—
James LaPorta,
CBS News,
1 Apr. 2026
-
Ahead of the 2026 World Cup, soccer leaders within Congo enlisted a strategy widely used in international soccer — calling in the help of dual-national players with lineage to the country but who developed as players outside its borders.—
Andrew Greif,
NBC news,
1 Apr. 2026
Cite this Entry
“Frontiers.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/frontiers. Accessed 8 Apr. 2026.
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