boundary */*/

UK [ˈbaʊnd(ə)rɪ] / US noun [countable]
Word forms "boundary":
singular boundary plural boundaries

1)

a) something such as a line on a map that marks where one area of land ends and another begins

a proposal to redraw the city boundary

Akbar extended the boundaries of his empire in the north and to the south.

boundary with:

Estonians and Latvians began to query the status of their boundaries with Russia.

b) a physical object such as a wall or fence that marks the limits of an area

a boundary fence/wall

boundary between:

The lane once formed the boundary between the two villages.

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See:

border I

2)

a) [usually plural] the limits of an activity or experience

a community in which class boundaries are very clearly drawn

push back/extend the boundaries of something:

new research that pushes back the boundaries of genetic science

cut across boundaries:

The party's support cuts across religious boundaries (= is not influenced by differences among religions).

b) an imaginary point separating two different qualities, ideas etc

boundary between:

The boundary between fact and fiction in her writing is often blurred.

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Collocations:
Verbs frequently used with boundary as the object ▪  cross, define, establish, extend, overstep, push back

3) the outer edge of the playing area in cricket

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- know no boundaries