0 a boundary between countries -- เขตแดน
(also adjective) a frontier town.
We crossed the frontier
1 the farthest area of land on which people live and work, before the country becomes wild and deserted -- อาณาเขต
Many families went to make a new life on the frontier.
2 the limits or boundaries (of knowledge etc) -- ขอบข่าย
the frontiers of scientific knowledge.
Evidently, the events across the border were reviving dormant resentments throughout the western frontier lands.
That's exactly why those who are working at the frontier of the subject should know some history of economic thought.
Once land conservation policies meet the agricultural frontier, they have two opposing effects on the economy's aggregate rents.
Secondly, the frontier method is carried out mainly on the semantic domains of a program; the method pays little attention to the program text itself.
This frontier will not result from a few counties which may have abnormally high output for their given input endowments.
In a society gifted at generalisation, endowed with powerful ^ centralizing strategies, the historian moves in the direction of the frontiers of great regions already exploited.
In this way the frontiers of the feasible regions of the mechanism space were misrepresented.
But then, this also refers to our frontiers as a whole.