boundary - definition in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online (US)

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English definition of “boundary”

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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.
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(Definition of boundary from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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