The phrase "adjacent country" is correct and usable in written English.
It can be used to refer to a country that is next to or bordering another country.
Example: "The trade agreement will benefit both our nation and the adjacent country."
Alternatives: "neighboring country" or "bordering nation".
"The wail of the chestnut tree lover is heard from all parts of New York, Long Island and adjacent country," The Times wrote in 1908.
A map on Page 4 of the Travel section today with the Surfacing column, about Bulgaria, carries an outdated label in some copies for an adjacent country to the west.
The bulletin board by a pay phone outside the two adjacent country stores advertises yoga classes and in-line skating as well as bingo and an Elks Club banquet.
They proceeded to the Farnborough station (South-Western Railway), which is sixteen miles from Windsor, where the Royal railway carriage was in waiting.The various stations on the line between Farnborough and Southampton were decorated with flags and laurel, and the inhabitants of the adjacent country and villages were assembled in great numbers to show their loyalty, and gratify their curiosity.
The presence of irregular subvolcanic intrusions and a profusion of dikes within the breccia but not in adjacent country rock provide further evidence of the Silverthrone Caldera.
Dale published these in a pamphlet entitled Descriptive Account of the Panoramic View &c. of King George's Sound and the Adjacent Country, which Pettigrew encouraged his guests to buy as a souvenir of their evening.
The networks have to consist of at least two Nordic institutions in two different Nordic countries, and two institutions in two different adjacent area countries.
Our results reported here could be useful in efforts to control measles in Vietnam and adjacent neighboring countries.
Surrounded by woodland, the estate makes for a perfect day trip, and it can easily be extended to the adjacent country-cottage estate Waldsiedlung Krumme Lanke, initiated by Heinrich Himmler as a direct counter-statement to the modernist homes next door, and to provide homes for families of the SS.
And the disease has spread from Nigeria to adjacent countries.
Maps of Europe after Chernobyl, depicting radiation levels in all adjacent countries, showed fallout miraculously stopping at the French border.
