demarcation
[noun]
Synonyms: delimitation, differentiation, distinction, division, separation

[TahlilGaran] English Synonym Dictionary ▲

de‧mar‧ca‧tion /ˌdiːmɑːˈkeɪʃən $ -ɑːr-/ noun [uncountable] formal
[Date: 1700-1800; Language: Spanish; Origin: demarcación, from marcar 'to mark']

1. the point at which one area of work, responsibility etc ends and another begins
demarcation between
traditional lines of demarcation between medicine and surgery

2. the process of deciding on or marking the border between two areas of land
demarcation of
the exact demarcation of the north-south boundary

[TahlilGaran] Dictionary of Contemporary English ▲