frontier
Americannoun
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the part of a country that borders another country; boundary; border.
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the land or territory that forms the furthest extent of a country's settled or inhabited regions.
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Often frontiers.
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the limit of knowledge or the most advanced achievement in a particular field.
the frontiers of physics.
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an outer limit in a field of endeavor, especially one in which the opportunities for research and development have not been exploited.
the frontiers of space exploration.
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Mathematics. boundary.
adjective
noun
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the region of a country bordering on another or a line, barrier, etc, marking such a boundary
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( as modifier )
a frontier post
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the edge of the settled area of a country
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( as modifier )
the frontier spirit
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(often plural) the limit of knowledge in a particular field
the frontiers of physics have been pushed back
Related Words
See boundary.
Other Word Forms
- frontierless adjective
- frontierlike adjective
- semifrontier noun
- transfrontier adjective
Etymology
Origin of frontier
1350–1400; Middle English frounter < Old French frontier, equivalent to front (in the sense of opposite side; front ) + -ier -ier 2
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.
Anthropic isn’t the only frontier lab documenting distillation attacks.
From MarketWatch
Anthropic announced a two-year agreement with the Department of Defense in July to “prototype frontier AI capabilities that advance U.S. national security.”
From Los Angeles Times
The final frontier of silicon etching aims to cut that down to about 5 nanometers.
“We are entering a new phase where frontier AI moves from research into daily use at global scale,” OpenAI said in a statement.
From MarketWatch
A small party heads for the northern frontier, where they will find something more than the treasure they hoped for.
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
