Definition of “boundary” - English Dictionary

british dictionary

“boundary” in British English

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boundarynoun [ C ]

uk /ˈbaʊn.dər.i/ us /ˈbaʊn.dər.i/

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.

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(Definition of “boundary” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“boundary” in American English

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boundarynoun [ C ]

us /ˈbɑʊn·dri, -də·ri/

an edge or limit of something:

You can camp anywhere inside the boundaries of the park.
Your work is limited only by the boundaries of your imagination.

(Definition of “boundary” from the Cambridge Academic Content Dictionary © Cambridge University Press)