boundary

[boun-duh-ree, -dree] / ˈbaʊn də ri, -dri /

NOUN

outer limit

Synonyms

STRONGEST

barrier border borderline bounds confines edge frontier horizon line perimeter

STRONG

ambit beginning borderland brink circumference circumscription compass end environs extent extremity frame fringe hem limits march margin mark mere mete outline outpost pale periphery precinct purlieus radius rim side skirt terminal termination terminus verge

WEAK

abuttals line of demarcation

Antonyms

STRONGEST

center inside interior middle

STRONG

opening start

WEAK

minimum

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

This is a boundary issue as much as it is a housing one.

From MarketWatch • Apr. 29, 2026

This confirms it as the true boundary of the Milky Way's star-forming disk.

From Science Daily • Apr. 29, 2026

The blurred boundary between dreams and memories is a recurring element in Ms. Phillips’s memoir, “Small Town Girls,” as it is in the six novels and the handful of short-story collections she’s written to date.

From The Wall Street Journal • Apr. 17, 2026

I press her to say who she means, but it’s the one time she sets a boundary.

From Los Angeles Times • Apr. 15, 2026

“Felward’s Falling,” I said with something that touched the outward boundary of respect.

From "The Name of the Wind" by Patrick Rothfuss

Vocabulary lists containing boundary

Human Geography - Middle School

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Human Geography - High School

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Political Geography - Middle School

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