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.

There was a run of 18 deliveries without a boundary and India could not get going again.

From BBC • May 30, 2026

Dehghani advises that parents look out for shifts in the boundary between themselves and the group that they’re beginning to align with.

From Los Angeles Times • May 23, 2026

The boundary at which gaming ends and AI begins has always been blurry.

From MarketWatch • May 23, 2026

The study, titled "Meridionally consistent decline in the observed western boundary contribution to the Atlantic Meridional Overturning Circulation," was published in Science Advances.

From Science Daily • May 10, 2026

Operation Gold began in the summer of 1954 with the construction of a drab-looking warehouse sitting just over the boundary separating East and West Berlin.

From "Spies: The Secret Showdown Between America and Russia" by Marc Favreau

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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