frontier
Pronunciation:
/fɹʌnˈtɪə//fɹʌnˈtɪɹ/noun
Definitions
The part of a country which borders or faces another country or unsettled region
The most advanced or recent version of something; leading edge.
Example: the frontier of civilization
An outwork of a fortification.
verb
Definitions
To live as pioneers on frontier territory.
To place on the frontier.