Something (such as a river, a fence, or an imaginary line) that shows where an area ends and another area begins.
noun. This fence forms a boundary. This fence forms a boundary. The definition of a boundary is a line or something else that marks a limit or border. An example of boundary is a barbed wire fence : something (such as a river, a fence, or an imaginary line) that shows where an area ends and another area begins. : a point or limit that indicates where two things become different. boundaries: unofficial rules about what should not be done: limits that define acceptable behavior. plural bound·aries. Full Definition of BOUNDARY. : something that indicates or fixes a limit or extent. — bound·ary·less \-ləs\ adjective. — bound·ary·less·ness noun. See boundary defined for English-language learners. See boundary defined for kids. ADVERTISEMENT Noun. 1. boundary-the line or plane indicating the limit or extent of something. bounds, bound. hairline-the natural margin formed by hair on the head. frontier-an international boundary or the area (often fortified) immediately inside the boundary. This is the British English definition of boundary. View American English definition of boundary. Change your default dictionary to American English. View the pronunciation for boundary. Definition and synonyms of boundary from the online English dictionary from Macmillan Publishers Limited. 3 Toull. n. 171. 2. Boundary also signifies stones or other materials inserted in the earth on the confines of two estates. 3. Boundaries are either natural or artificial. A river or other stream is a natural boundary, and in that case the centre of the stream is the line. 20 John.  Convergent boundary. From Wikipedia, the free encyclopedia. In plate tectonics, a convergent boundary, also known as a destructive plate boundary (because of subduction), is an actively deforming region where two (or more) tectonic plates or fragments of the lithosphere move toward one another and collide.  Learner's definition of BOUNDARY. 1. [count] : something (such as a river, a fence, or an imaginary line) that shows where an area ends and another area begins. Those two trees mark the boundary of our property. The river forms the country's western boundary. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples. [count] : something (such as a river, a fence, or an imaginary line) that shows where an area ends and another area begins. Those two trees mark the boundary of our property. The river forms the country's western boundary boundary. n, pl-ries. 1. something that indicates the farthest limit, as of an area; border. 2. (Cricket) cricket. a. the marked limit of the playing area. 1. boundary-the line or plane indicating the limit or extent of something. bounds, bound. hairline-the natural margin formed by hair on the head. frontier-an international boundary or the area (often fortified) immediately inside the boundary.
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Boundary definition