Definition of boundary
: 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
boundarylessplay \-ləs\ adjective
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 of boundary from the Web
A weak frontal boundary moving in from the north took its time passing through the area, which led to several hours of mostly cloudy skies.
Now in their third year on varsity, the seniors are on the other side of the fence — or rather, the district boundaries — and are a big reason why the Griffins are heading back to the state quarterfinals for the second straight season.
White Center had the reputation of being just outside the boundary of the civilized world.
Federal waters extend beyond the nine-nautical mile boundary that is currently controlled by the five Gulf states.
The two cities worked together last year to clean up trash and debris on both sides of Clay Street, their joint boundary line.
Mason McQuet also values his dad's penchant for not overstepping his boundaries.
The boundaries don’t really matter as much anymore.
The deadline is June 5 — one week before the City Council will choose an option and approve the boundaries.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'boundary'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of boundary
2bound + 1-ary
First Known Use: 1598
BOUNDARY Defined for English Language Learners
Definition of boundary for English Language Learners
: something (such as a river, a fence, or an imaginary line) that shows where an area ends and another area begins
: a point or limit that indicates where two things become different
boundaries : unofficial rules about what should not be done : limits that define acceptable behavior
BOUNDARY Defined for Kids
Definition of boundary for Students
: something that points out or shows a limit or end : a dividing line
Legal Definition of boundary
: a theoretical line that marks the limit of an area of land
Seen and Heard
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