frontier
Proposed by a contributor, not yet supported by evidence.
Also seen as: frontiers · frontiering · frontiered
Sense 1
The part of a country which borders or faces another country or unsettled region.
Noun
Examples
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Sense 2
The most advanced or recent version of something; the leading edge.
Noun
Examples
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Sense 3
To live as pioneers on frontier territory.
Verb
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Common questions
What does “frontier” mean?
The part of a country which borders or faces another country or unsettled region.
Is “frontier” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.