- the limit of knowledge or the most advanced achievement in a particular field: the frontiers of physics.
- an outer limit in a field of endeavor, especially one in which the opportunities for research and development have not been exploited: the frontiers of space exploration.
Origin of frontier
Examples from the Web for transfrontier
Historical Examples of transfrontier
It is a mart for transfrontier trade with Tibet and Yarkand.
- the region of a country bordering on another or a line, barrier, etc, marking such a boundary
- (as modifier)a frontier post
- the edge of the settled area of a country
- (as modifier)the frontier spirit
Word Origin for frontier
c.1400, from Old French frontier "prow of a ship, front rank of an army" (13c.), noun use of adjective frontier "facing, neighboring," from front "brow" (see front (n.)).
Originally the front line of an army, sense of "borderland" is first attested early 15c. In reference to North America, from 1670s; later with a specific sense:
What is the frontier? ... In the census reports it is treated as the margin of that settlement which has a density of two or more to the square mile. [F.J. Turner, "The Frontier in American History," 1920]
Frontiersman is from 1782.