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Frontier
01
the outer edge of occupied or developed land, beyond which lies unsettled territory
Grammatical Information
Animacy status
Abstract
Composition
Simple
Countable
Plural form
frontiers
Examples
Pioneers migrated westward, steadily pushing the frontier of settlement into new territories.
02
an undeveloped field of study; a topic inviting research and development
03
an area located at a border, where two countries or regions meet
Examples
The town lies right on the frontier, making it a strategic location for trade.
