boundary

noun
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

Keep scrolling for more

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?
See More

Recent Examples on the Web

Without prompting, the testimonies stack up: Gender is another boundary that is breaking down. Mikael Jansson, Vogue, "14 Countries, 14 Superstars: The Global Actors Who Know No Limits," 14 Mar. 2019 Breaking the rules of traditional design, Troy was able to free his creations from aesthetic boundaries while exploring new techniques through the use of these evocative materials. Lucia Tonelli, ELLE Decor, "A Bold and Sculptural New Furniture Collection Inspired by the Basics," 26 Feb. 2019 Under Oregon law, cities and towns have urban growth boundaries to control urban expansion onto farms and forests. Andrew Selsky, The Seattle Times, "Oregon aims to tackle homelessness, housing crisis," 11 Feb. 2019 Watching this moment in history inspires me and so many of my peers to push past perceived boundaries and create new possibilities. Yara Shahidi, Teen Vogue, ""Yes She Can" Is the Yara Shahidi-Approved Collection of Stories From Young Women Staffers of the Obama White House," 14 Jan. 2019 The First Amendment protects political speech; pushing boundaries to test the limits of civil discourse is something very different. Jennifer Ouellette, Ars Technica, "Book tells the inside story of how Reddit came to be the Internet’s “id”," 30 Dec. 2018 Though Midge isn't modeled after Mabley per se, her importance in comedic history can't be ignored—both for breaking boundaries as an African American and out lesbian in the 1920s, and for her influence on later comedians. Chloe Foussianes, Town & Country, "The Marvelous Mrs. Maisel," 16 Dec. 2018 This is a wonderful time to focus your attention inward and reflect on your relationships, responsibilities, and — perhaps most importantly — boundaries. Aliza Kelly Faragher, Allure, "What November's Leo Horoscope Means for You," 28 Oct. 2018 The firn layer in the ice sheet, the boundary between snow and ice, is heating up and becoming denser. Umair Irfan, Vox, "Greenland’s ice sheet is melting at its fastest rate in centuries," 8 Dec. 2018

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.

See More

First Known Use of boundary

1598, in the meaning defined above

History and Etymology for boundary

bound entry 2 + -ary entry 1

Keep scrolling for more

Learn More about boundary

Statistics for boundary

Last Updated

21 Mar 2019

Look-up Popularity

Time Traveler for boundary

The first known use of boundary was in 1598

See more words from the same year

Keep scrolling for more

More Definitions for boundary

boundary

noun

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

boundary

noun
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

boundary

noun
bound·​ary
plural boundaries

Legal Definition of boundary

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

Keep scrolling for more

More from Merriam-Webster on boundary

Rhyming Dictionary: Words that rhyme with boundary

Thesaurus: All synonyms and antonyms for boundary

Spanish Central: Translation of boundary

Nglish: Translation of boundary for Spanish Speakers

Britannica English: Translation of boundary for Arabic Speakers

Comments on boundary

What made you want to look up boundary? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

the range of authority or knowledge

Get Word of the Day daily email!

Test Your Vocabulary

Original Meanings Quiz

  • rembrandt-painting-a-young-scholar-and-his-tutor
  • Which of the following is the earliest known sense of the word awe?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!