名词

1. （土地的）分界线，边界
The boundary of an area of land is an imaginary line that separates it from other areas.

2. （学科或活动的）界限，边界
The boundaries of something such as a subject or activity are the limits that people think that it has.

1. the greatest possible degree of something

e.g. what he did was beyond the bounds of acceptable behavior
to the limit of his ability

Synonym: limitbound

2. the line or plane indicating the limit or extent of something

Synonym: boundbounds

3. a line determining the limits of an area

Synonym: edgebound