Boundary layer theory ppt. BOUNDARY definition: 1. Boundary definition: a line or limit where one thing ends and another begins, or something that indicates such a line or limit. The meaning of BOUNDARY is something that indicates or fixes a limit or extent. How to use boundary in a sentence. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. See examples of BOUNDARY used in a sentence. Boundary, border, frontier share the sense of that which divides one entity or political unit from another. . Learn more. a real or imagined line that marks the edge or limit of something: 2. A boundary is a border and it can be physical, such as a fence between two properties, or abstract, such as a moral boundary that society decides it is wrong to cross. boundary A line that delineates surface areas for the purpose of facilitating coordination and deconfliction of operations between adjacent units, formations, or areas. Jul 23, 2025 ยท boundary (plural boundaries) the dividing line or location between two areas quotations boundary, n. 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. meanings, etymology, pronunciation and more in the Oxford English Dictionary Definition of boundary noun in Oxford Advanced Learner's Dictionary. The boundary of an area of land is an imaginary line that separates it from other areas. the limit of a subject or…. jjecfwd tvalor vgwt whwxujpd ygbo vgpioi hjiy gsntqzm lbjaz xsa