boundary
noun
bound·ary
ˈbau̇n-d(ə-)rē 
plural boundaries
: something that indicates or fixes a limit or extent
Those two trees mark the boundary of our property.
the mountain range that forms the country's northern boundary
boundarylessness
noun
Examples of boundary in a Sentence
Those two trees mark the boundary of our property.
The river forms the country's western boundary.
at the boundary between fact and fiction
You need to set boundaries with your children.
Did he violate the boundaries of the doctor-patient relationship?
Recent Examples on the Web
The Education Department has also encouraged school districts to spend some federal money meant for disadvantaged students on services from private providers and on children from low-income families who live within district boundaries but attend private schools.
—
Megan O’Matz, ProPublica, 10 Oct. 2025
The events test longstanding norms separating the White House from Department of Justice (DOJ) decision-making—a boundary traditionally aimed at preserving public confidence in impartial justice.
—Deputy News Editor, MSNBC Newsweek, 10 Oct. 2025
A week or two might pass, and the unexplained things might start back again, but set some boundaries.
—Maggie Menderski, Louisville Courier Journal, 10 Oct. 2025
On Friday, the pair told a select group of journalists at the Gobelins school in Paris that the project will give the next generation of animation artists the opportunity to learn, collaborate, innovate and push the boundaries of stop-motion craft.
—Elsa Keslassy, Variety, 10 Oct. 2025
See All Example Sentences for boundary
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Megan O’Matz, ProPublica, 10 Oct. 2025
The events test longstanding norms separating the White House from Department of Justice (DOJ) decision-making—a boundary traditionally aimed at preserving public confidence in impartial justice.
—Deputy News Editor, MSNBC Newsweek, 10 Oct. 2025
A week or two might pass, and the unexplained things might start back again, but set some boundaries.
—Maggie Menderski, Louisville Courier Journal, 10 Oct. 2025
On Friday, the pair told a select group of journalists at the Gobelins school in Paris that the project will give the next generation of animation artists the opportunity to learn, collaborate, innovate and push the boundaries of stop-motion craft.
—Elsa Keslassy, Variety, 10 Oct. 2025
See All Example Sentences for boundary
Cite this Entry
“Boundary.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/boundary. Accessed 14 Oct. 2025.
Copy CitationKids Definition
boundary
noun
bound·ary
ˈbau̇n-d(ə-)rē
plural boundaries
: something that points out or shows a limit or end : dividing line
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