dividing line 
noun
1The boundary between two areas: the dividing line between eastern and western zones...
- The couple's first piece of furniture, a primitive farm table, is the dividing line between the kitchen and sitting area.
- It was so undesirable that residents of the tony Back Bay area built a fence along the dividing line between the two neighborhoods.
- For millenniums, the frontier between these two countries has been the dividing line between contending empires - and so it is again.
1.1A distinction or set of distinctions marking the difference between two things that are closely related: the smudged dividing line between drama and reality...
- Views will differ as to where the dividing line should be drawn.
- The imposition of order necessarily creates boundaries and dividing lines - the very places where the most interesting discussions occur.
- The old line, the heretofore uncompromising line, the dividing line between matter and spirit has suddenly blurred.
- weigela
- weigh
- weighable
- weigh anchor
- weigh a ton
- weighbridge
- weigher
- weigh in
- weigh in at
- weigh into
- weigh on
- weigh one's words
- weigh (or raise) anchor
- weigh out
- weigh someone down
- weigh someone/thing up
- weigh station
- weight
- weight belt
- weighted average
- weight gain
- weightily
- weightiness
- weighting
- weightless