bound·​ary | \ ˈbau̇n-d(ə-)rē How to pronounce boundary (audio) \
plural boundaries

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

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Other Words from boundary

boundaryless \ ˈbau̇n-​d(ə-​)rē-​ləs How to pronounce boundaryless (audio) \ adjective
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?
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Recent Examples on the Web Phoenix said at the close of his speech, referencing the trail Ledger blazed with his Oscar-winning, boundary-pushing work in the superhero thriller. Joey Nolfi,, "Joaquin Phoenix tributes 'favorite actor' Heath Ledger in moving SAG Awards speech," 20 Jan. 2020 Each episode in the nine-episode first season unveils the boundary-pushing imagination of the visionaries who dared to dream and build them. cleveland, "Apple TV+: What’s coming soon to the streaming service," 20 Jan. 2020 Our discomfort with it can discourage us from pushing boundaries and learning new things. Ravi Kumar, Quartz at Work, "How can we create a workforce full of lifelong learners?," 20 Jan. 2020 There’s no official title or release date yet, but the boundary-pushing rapper is already teasing her upcoming project in interviews. Erica Gonzales, Harper's BAZAAR, "15 New Music Releases That'll Make Your Playlists More Exciting in 2020," 6 Jan. 2020 While K-pop is considered a relatively modern-day music scene -- with most pointing to early '90s artists like Seo Taiji and Boys' boundary-breaking pop/hip-hop mashups as the genre's genesis -- Park's musical inspirations are classic. Jeff Benjamin, Billboard, "J.Y. Park Shares the Real-Life Inspirations That Fuel His 25-Plus Years at the Center of K-Pop," 31 Dec. 2019 From Olympic podiums in Canada, Brazil and Russia to the wrestling mats at Denver’s Pepsi Center, Colorado’s female athletes pushed the boundaries of excellence. The Denver Post, "Colorado’s biggest stories of the past decade," 31 Dec. 2019 The main arc of the season follows 2 Live Crew, a boundary-pushing group whose provocative lyrics prompted numerous legal challenges—including one that eventually landed in front of the Supreme Court. Laura Jane Standley, The Atlantic, "The 50 Best Podcasts of 2019," 27 Dec. 2019 Rife with gospel influences, the 11-track album marks a notable departure for the boundary-pushing rapper. Washington Post, "Kanye West finally releases ‘Jesus Is King.’ From the movie tie-in to Kenny G’s cameo, here’s what to know.," 25 Oct. 2019

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.

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First Known Use of boundary

1598, in the meaning defined above

History and Etymology for boundary

bound entry 6 + -ary entry 1

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Time Traveler for boundary

Time Traveler

The first known use of boundary was in 1598

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Statistics for boundary

Last Updated

7 Feb 2020

Cite this Entry

“Boundary.” Dictionary, Merriam-Webster, Accessed 18 Feb. 2020.

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More Definitions for boundary


How to pronounce boundary (audio)

English Language Learners Definition of boundary

: 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
: unofficial rules about what should not be done : limits that define acceptable behavior


bound·​ary | \ ˈbau̇n-də-rē How to pronounce boundary (audio) , ˈbau̇n-drē \
plural boundaries

Kids Definition of boundary

: something that points out or shows a limit or end : a dividing line


plural boundaries

Legal Definition of boundary

: a theoretical line that marks the limit of an area of land

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