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
According to the laboratory, sargassum in the Atlantic was first reported in 1492 by Christopher Columbus during his voyage in the North Atlantic Ocean, which possibly led to the name of Sargasso Sea, the only sea on Earth that has no physical boundary.
—
Doyle Rice, USA Today, 2 May 2025
The evening’s dress code is Tailored for You, which will hopefully inspire celebrities to push the boundaries of tailored menswear and embrace the opportunity to highlight Black designers.
—Whitney Perry, Glamour, 2 May 2025
In 1957, Novak (Sweeney), one of the biggest box office stars of her time and the luminous face of Vertigo, falls for Davis Jr. (Jonsson), the multi-talented Rat Pack sensation who defied boundaries of race and fame.
—Andreas Wiseman, Deadline, 2 May 2025
Ahead of the 2025 season, MLB umpires were instructed to recognize the buffer zone as ± 0.75 inches from the boundary of the strike zone.
—Eno Sarris, New York Times, 2 May 2025
See All Example Sentences for boundary
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Doyle Rice, USA Today, 2 May 2025
The evening’s dress code is Tailored for You, which will hopefully inspire celebrities to push the boundaries of tailored menswear and embrace the opportunity to highlight Black designers.
—Whitney Perry, Glamour, 2 May 2025
In 1957, Novak (Sweeney), one of the biggest box office stars of her time and the luminous face of Vertigo, falls for Davis Jr. (Jonsson), the multi-talented Rat Pack sensation who defied boundaries of race and fame.
—Andreas Wiseman, Deadline, 2 May 2025
Ahead of the 2025 season, MLB umpires were instructed to recognize the buffer zone as ± 0.75 inches from the boundary of the strike zone.
—Eno Sarris, New York Times, 2 May 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 9 May. 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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