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.

Smith starred again in the second wicket when Jamie Smith, having just driven Bamber to the cover boundary, attempted to repeat the shot and was caught by the keeper, diving in front of slip.

From BBC • Apr. 3, 2026

Drag was an important part of Ortiz’s approach to playing Jim Jimenez, the boundary breaking nonbinary pirate heartthrob on HBO’s cult show “Our Flag Means Death.”

From Los Angeles Times • Apr. 1, 2026

Unless the stock can get firmly above the upper boundary of the resistance zone, which comes in around $298, the key downside level to watch is the March 12 intraday low of around $279.

From MarketWatch • Mar. 31, 2026

Though the latest Census data cover metro areas and counties, San Francisco is a rare big city that fits inside a county boundary.

From The Wall Street Journal • Mar. 27, 2026

I pull it loose and cross an invisible boundary from immortal to mortal.

From "The Adoration of Jenna Fox" by Mary E. Pearson

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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