Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “boundary”

See all translations

boundary

noun [C] uk   /ˈbaʊn.dər.i/ /-dri/ us    /-dɚ-/
C1 a real or imagined line that marks the edge or limit of something: The Ural mountains mark the boundary between Europe and Asia. Residents are opposed to the prison being built within the city boundary.C1 the limit of a subject or principle: Electronic publishing is blurring the boundaries between dictionaries and encyclopedias.
More examples
Translations of “boundary”
in Korean 경계…
in Arabic حَدّ فاصِل…
in French frontière, limite…
in Turkish sınır, çizgi, hat…
in Italian limite, confine…
in Chinese (Traditional) 分界線, 邊界, 界限…
in Russian граница, предел…
in Polish granica…
in Spanish frontera, punto…
in Portuguese limite, fronteira…
in German die Grenzlinie, der Schlag bis zur Spielfeldgrenze…
in Catalan límit, frontera…
in Japanese 境界線…
in Chinese (Simplified) 分界线, 边界, 界限…
(Definition of boundary from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of boundary?
Add Cambridge dictionaries to your browser to your website

Definitions of “boundary” in other dictionaries

SMART Thesaurus: Territorial boundaries

“boundary”: synonyms and related words:

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

Word of the Day

sail

When a boat or a ship sails, it travels on the water.

Word of the Day

Byronic, Orwellian and Darwinian: adjectives from names.

by Liz Walter,
April 15, 2015
Becoming an adjective is a strange kind of memorial, but it is often a sign of a person having had real influence on the world. Science is full of examples, from Hippocrates, the Greek medic born around 460 BC, who gave his name to the Hippocratic Oath still used by doctors today,

Read More 

dumbwalking noun

April 20, 2015
walking slowly, without paying attention to the world around you because you are consulting a smartphone He told me dumbwalking probably wouldn’t be a long-term problem.

Read More