an imaginary limit or border between one place or thing and another
مرز, حد, خط مرزی, محدودهٔ فرضی, خط فرضی, مرزبندی
lines of longitude and latitude
He was convicted of illegally importing weapons across state lines.
see also coastline, county line, dividing line(2), fault line(1), International Date Line, state line, treeline, waterline