boundary
US /ˈbaʊndəri, -dri/
・UK /'baʊndrɪ/
B1
noun
- A division or border to separate two areas
- The limit of what is known or thought possible.
- A line that marks the limits of an area; a border.
- A limit or extent to something.
- In sports, a line or marker indicating the edge of the playing area.