boundary

a line that marks the edge of an area or separates two areas

límite, frontera, borde

• the boundary between A and B

Collocations boundary line · national boundary

• The boundary between the two countries is a river.

  La frontera entre los dos países es un río.

a rule or principle that limits what you can do

límite, regla, norma

• there is no boundary to sth

Collocations boundary of acceptability · ethical boundaries

• There are no boundaries to creativity.

  No hay límites para la creatividad.

a line on a sports field that marks the edge of the playing area

línea de banda, línea del campo

• the boundary between A and B

Collocations boundary line in cricket · touch the boundary

• The ball hit the boundary.

  La pelota tocó la línea de banda.