Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “frontier”

See all translations

frontier

noun [C] uk   /ˈfrʌn.tɪər/ /frʌnˈtɪər/ us    /-ˈtɪr/
C2 a border between two countries, or (especially in the past in the US) a border between land used to grow crops where people live and wild land: Some of the frontier between Germany and Poland follows the course of the river Oder Nepal has frontiers with both India and China. They lived in a town close to the frontier.
More examples
(Definition of frontier from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of frontier?
Add Cambridge dictionaries to your browser to your website

Definitions of “frontier” in other dictionaries

SMART Thesaurus: Territorial boundaries

“frontier”: synonyms and related words:

You can also find related words, phrases, and synonyms in the topics:

Word of the Day

christmassy

typical of Christmas, or happy because it is Christmas

Word of the Day

Cleavage proves divisive in Cambridge’s words of 2014

by Alastair Horne,
December 19, 2014
​​​​ Other dictionaries may choose faddish novelties as their words of the year, but here at Cambridge, we like to do something different. We look for the words that have seen sudden surges in searches over the course of the year – words that have been baffling users of English and driven them

Read More 

tweleb noun

December 22, 2014
informal a Twitter celebrity; (more specifically, someone who has more than 1,000 followers on Twitter) There were a few old and a few new faces, including a tweleb or two. Expect to see and hear more from these cool kids.

Read More