n. the line or plane indicating the limit or extent of something
n. a line determining the limits of an area
n. 边界, 分界线
[计] 边界
1. The boundary between the two countries is marked by a river.
两国之间的边界由一条河流标记。
2. It's important to set clear boundaries in a friendship.
在友谊中设定明确的界限是很重要的。
3. The fence serves as a boundary for our property.
这道围栏是我们财产的边界。