transfrontier

frontier

[fruhn-teer, fron-; also, esp. British, fruhn-teer]
noun
1.
the part of a country that borders another country; boundary; border.
2.
the land or territory that forms the furthest extent of a country's settled or inhabited regions.
3.
Often, frontiers.
a.
the limit of knowledge or the most advanced achievement in a particular field: the frontiers of physics.
b.
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.
4.
Mathematics, boundary ( def 2 ).
adjective
5.
of, pertaining to, or located on the frontier: a frontier town.

Origin:
1350–1400; Middle English frounter < Old French frontier, equivalent to front (in the sense of opposite side; see front) + -ier -ier2

frontierless, adjective
frontierlike, adjective
semifrontier, noun
transfrontier, adjective


1. See boundary.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
frontier (ˈfrʌntɪə, frʌnˈtɪə)
 
n
1.  a.  the region of a country bordering on another or a line, barrier, etc, marking such a boundary
 b.  (as modifier): a frontier post
2.  (US), (Canadian)
 a.  the edge of the settled area of a country
 b.  (as modifier): the frontier spirit
3.  (often plural) the limit of knowledge in a particular field: the frontiers of physics have been pushed back
 
[C14: from Old French frontiere, from front (in the sense: part which is opposite); see front]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

frontier
c.1400, from O.Fr. fronter, from front "brow" (see front). Originally the front line of an army, sense of "borderland" is first attested 1413. In reference to N.Amer., from 1676; 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"]
Frontiersman is from 1782.
Online Etymology Dictionary, © 2010 Douglas Harper
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