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TOEFL IELTS BNC: 2050 COCA: 2776

boundary

noun

bound·​ary ˈbau̇n-d(ə-)rē How to pronounce boundary (audio)
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
boundaryless adjective
boundarylessness noun

Example Sentences

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 On the next snap, former Bears safety Tashaun Gipson dropped a potential interception on a pass to the boundary to Equanimeous St. Brown. Brad Biggs, Chicago Tribune, 12 Sep. 2022 Situated on a narrow spit of land at the edge of the bluff that forms the southern boundary of Mission Valley, the property has sweeping westward views across Mission Bay with the ocean in the distance. Paul Sisson, San Diego Union-Tribune, 29 Aug. 2022 If a planet orbits a star in the bulk, the shadows of the planet and star do a little dance on the boundary. George Musser, Scientific American, 17 Aug. 2022 Branson won the commercial sub-orbital space race in 2018 when his company launched its first piloted test flight above 50 miles, the boundary of space recognized by NASA and the FAA. William Harwood, CBS News, 4 Aug. 2022 This helps to sustain the momentum beyond the boundary of the meeting. Shani Harmon, Forbes, 2 Aug. 2022 Many a photo of Ben Affleck has been launched over the boundary of Regular Paparazzi Picture and into Viral Twitter Meme territory. Chelsey Sanchez, Harper's BAZAAR, 25 July 2022 Man attempted to put out generator fire, police say On Friday, Utah Wildfire Info reported that crews had improved the fire line on the northern boundary of the blaze and were able to increase containment along its perimeter. Anastasia Hufham, The Salt Lake Tribune, 15 July 2022 Temperature contrast between these dueling air masses, and an approaching wave of low pressure aloft, will conspire to trigger the development of an area of low pressure on the frontal boundary this evening. Ian Livingston, Washington Post, 8 July 2022 See More

Word History

First Known Use

1598, in the meaning defined above

Time Traveler
The first known use of boundary was in 1598

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