FRONTIER


Meaning of FRONTIER in English

fron ‧ tier /ˈfrʌntɪə $ frʌnˈtɪr/ BrE AmE noun

[ Date: 1300-1400 ; Language: French ; Origin: frontière , from front ; ⇨ ↑ front 1 ]

1 . [countable] especially British English the border of a country

frontier between/with

Lille is close to the frontier between France and Belgium.

on/at the frontier

Troops established a road block on the frontier.

frontier town/area/post etc (=a town etc on a frontier)

2 . the frontier an area where people have never lived before, that not much is known about, especially in the western US before the 20th century:

a novel about a family’s struggle on the American frontier

space, the final frontier

3 . the frontiers of knowledge/physics etc the limits of what is known about something

push back the frontiers (=discover new things)

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THESAURUS

▪ border the official line that separates two countries, or the area close to this line:

The town lies on the border between Chile and Argentina.

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Strasbourg is very close to the German border.

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border guards

▪ frontier especially British English the border:

They crossed the Libyan frontier into Egypt.

▪ line the official line that separates states and counties in the US:

His family lived across the state line in West Virginia.

▪ boundary the line that marks the edge of an area of land that someone owns, or one of the parts of a country:

The fence marks the boundary between the two properties.

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The Mississippi River forms the boundary between Tennessee and Arkansas.

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A road runs along the western boundary of the site.

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.