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/frʌnˈtɪər/
Meaning & Definition
noun
A border between two countries or regions.
The soldiers were stationed at the frontier to monitor any illegal crossings.
The extreme limit of settled land beyond which lies wilderness.
In the 19th century, many pioneers moved westward to explore the American frontier.
An area of research or development that is new or not yet fully explored.
The scientists are working on the frontier of genetic engineering.
A boundary or limit of knowledge, experience, or achievement.
The frontier of understanding AI is constantly changing as new algorithms are developed.
Etymology
Late Middle English: from Old French 'frontière', from 'front' 'front' or 'forehead'.
Common Phrases and Expressions
frontier spirit:
A pioneering or adventurous attitude, especially in engaging with new things.
frontier justice:
A form of justice implemented by individuals rather than by legal authorities.
frontier town:
A settlement located at the edge of a developed area.
Related Words
Slang Meanings
Frontier land
We're headed out to the frontier land to find some adventure.
On the frontier
He's living on the frontier of what's possible in this field.