boundary

1 ENTRIES FOUND:
boundary /ˈbaʊndri/ noun
plural boundaries
boundary
/ˈbaʊndri/
noun
plural boundaries
Britannica Dictionary 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
2 
[count] : a point or limit that indicates where two things become different
3 
boundaries [plural] : unofficial rules about what should not be done : limits that define acceptable behavior

know no boundaries

1 
: to be capable of affecting people everywhere
2 
: to have no limits