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Definitions

frontier

[fruhn-teer, fron-, fruhn-teer] / frʌnˈtɪər, frɒn-, ˈfrʌn tɪər /




Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The administration wants to gain visibility into frontier capabilities without slowing American labs and advantaging China.

From The Wall Street Journal • Jun. 9, 2026

In that environment, the helmets may have been intended for local militias, forces serving the Kingdom of Valencia, or armed groups responsible for defending the region's maritime frontier.

From Science Daily • Jun. 8, 2026

The SpaceX IPO is the biggest sale of its type in history but it's just the first of a slew of mega-sales of shares in the companies at the frontier of the AI economy.

From BBC • Jun. 8, 2026

But, Mohan said, Apple doesn’t have to own the best frontier model if it owns the “trusted interface.”

From Barron's • Jun. 5, 2026

On June 7, 1790, Secretary of War Henry Knox told an army commander that the frontier was so extensive that it would be “altogether impossible” to defend.

From "An Indigenous People’s History of the United States" by Roxanne Dunbar-Ortiz




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