The meaning of BOUNDARY is something that indicates or fixes a limit or extent. How to use boundary in a sentence.

BOUNDARY definition: 1. a real or imagined line that marks the edge or limit of something: 2. the limit of a subject or…. Learn more.

Boundary definition: a line or limit where one thing ends and another begins, or something that indicates such a line or limit.. See examples of BOUNDARY used in a sentence.

Boundary (topology), the closure minus the interior of a subset of a topological space; an edge in the topology of manifolds, as in the case of a 'manifold with boundary'

A boundary is a border and it can be physical, such as a fence between two properties, or abstract, such as a moral boundary that society decides it is wrong to cross.

The boundary of an area of land is an imaginary line that separates it from other areas.

boundary A line that delineates surface areas for the purpose of facilitating coordination and deconfliction of operations between adjacent units, formations, or areas.

boundary, n. meanings, etymology, pronunciation and more in the Oxford English Dictionary

Definition of boundary noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Jul 23, 2025 · boundary (plural boundaries) the dividing line or location between two areas quotations