- something that indicates bounds or limits; a limiting or bounding line.
- Also called frontier. Mathematics. 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.Compare six(def 5).
Origin of boundary
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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for boundaries
What happened to true love knows no boundaries and all that?Freaking Out About Age Gaps in Gay Relationships Is Homophobic
January 9, 2015
But it is a worrying claim nonetheless, one of many testing the boundaries of this new area of law.Catholic Church: Religious Freedom Trumps Civil Rights
November 23, 2014
Many former employees described Masters as a demanding, overbearing micromanager who had no boundaries.The Godfather of Right-Wing Radio
November 23, 2014
The doctors promise that the initiative will “disarm the boundaries between psychiatry, humanities, and hip-hop culture.”Hip-Hop Psychology: Using Music to Fight Mental Illness
November 17, 2014
The fundamental issue: the boundaries of the underwater Lomonosov Ridge.Russia Preps Its North Pole Invasion
November 8, 2014
Boys were flogged at boundaries, to impress the boundaries on their memory.A Treatise on Parents and Children
George Bernard Shaw
Monks also erected crosses to mark the boundaries of the property of their monastery.English Villages
P. H. Ditchfield
Arthur pursued the path which would take him round the cathedral to the Boundaries.The Channings
Mrs. Henry Wood
The parties could agree neither on terms of consolidation nor on boundaries.Cleveland Past and Present
Never did he set his foot beyond the boundaries of his garden.The Chinese Fairy Book
- 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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for boundaries
Online Etymology Dictionary, © 2010 Douglas Harper