Date: 1600-1700
Origin: BOUND41


bound‧a‧ry S2 W3 plural boundaries
1 [countable] the real or imaginary line that marks the edge of a state, country etc, or the edge of an area of land that belongs to someoneCOLLOCATIONS COLLOCATIONS
national/state/city etc boundary (=a boundary between countries, states, cities etc) geographical/natural boundary (=a river, line of mountains etc that form a boundary) political boundary (=an official recognized boundary) mark a boundary cross a boundary boundary wall/fence boundary line boundary dispute (=a disagreement about where a boundary should be)
boundary between
The Mississippi River forms a natural boundary between Iowa and Illinois.
National boundaries are becoming increasingly meaningless in the global economy.
We would need their agreement to build outside the city boundary.
The stream curves round to mark the boundary of his property.
Anything that crosses the boundary of a black hole cannot get back.
We walked through the churchyard towards the boundary wall.
The property's boundary line is 25 feet from the back of the house.
boundary disputes between neighbouring countries
2 [countable usually plural] the limit of what is acceptable or thought to be possible
boundary of
the boundaries of human knowledge
within/beyond the boundaries of something
within the boundaries of the law
push back the boundaries (of something) (=to make a new discovery, work of art etc that is very different from what people have known before, and that changes the way they think)
art that pushes back the boundaries
3 [countable] the point at which one feeling, idea, quality etc stops and another starts
boundary of/between
the boundaries between work and play
the blurring of the boundaries between high and popular culture
4 [countable]DSC the outer limit of the playing area in cricket, or a shot that sends the ball across this limit for extra points

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