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We could not find the full phrase you were looking for. The entry for "boundary" is displayed below. Also see: mark
WordReference Random House Learner's Dictionary of American English © 2026bound•a•ry /ˈbaʊndəri, -dri/USA pronunciation
n. [countable], pl. -ries.
- something that indicates bounds or limits, as a line:A mountain range forms a natural boundary between the two countries.
boundary, border, frontier refer to something that divides one territory, state, country, etc., from another. boundary most often refers to a line on a map; it may be a physical feature, such as a river: Boundaries on this map are shown in red. border refers to a political or geographic dividing line; it may also refer to the region next to the actual line: crossing the Mexican border. frontier refers specifically to a border between two countries or the region adjoining this border: Soldiers guarded the frontier between Russia and China.
WordReference Random House Unabridged Dictionary of American English © 2026bound•a•ry
(boun′də rē, -drē),USA pronunciation n., pl. -ries.
- something that indicates bounds or limits;
a limiting or bounding line.
- MathematicsAlso called frontier. the collection of all points of a given set having the property that every neighborhood of each point contains points in the set and in the complement of the set.
- [Cricket.]a hit in which the ball reaches or crosses the boundary line of the field on one or more bounces, counting four runs for the batsman. Cf. six (def. 5).
1. Boundary, border, frontier share the sense of that which divides one entity or political unit from another. Boundary, in reference to a country, city, state, territory, or the like, most often designates a line on a map:boundaries are shown in red.Occasionally, it also refers to a physical feature that marks the agreed-upon line separating two political units:The Niagara River forms part of the boundary between the United States and Canada.Border is more often used than boundary in direct reference to a political dividing line; it may also refer to the region (of, for instance, a country) adjoining the actual line of demarcation:crossing the Mexican border; border towns along the Rio Grande.Frontier may refer to a political dividing line:crossed the Spanish frontier on Tuesday.It may also denote or describe the portion of a country adjoining its border with another country (towns in the Polish frontier) or, especially in North America, the most remote settled or occupied parts of a country:the frontier towns of the Great Plains.Frontier, especially in the plural, also refers to the most advanced or newest activities in an area of knowledge or practice:the frontiers of nuclear medicine.
Collins Concise English Dictionary © HarperCollins Publishers::
boundary /ˈbaʊndərɪ; -drɪ/ n ( pl -ries)- something that indicates the farthest limit, as of an area; border
- the marked limit of the playing area
- a stroke that hits the ball beyond this limit
- the four runs scored with such a stroke, or the six runs if the ball crosses the boundary without touching the ground
'boundary mark' also found in these entries (note: many are not synonyms or translations):
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