Verb

(demarcat)

To mark the limits or boundaries of something; to delimit.

* {{quote-book

, year=1907 , author=George Curzon , title= , passage=Small Committees of officials are frequently appointed in advance to consider the geographical, topographical, and ethnological evidence that is forthcoming, and to construct a tentative line for their respective Governments; this, after much debate, is embodied in a treaty, which provides for the appointment of Commissioners to demarcate the line upon the spot and submit it for ratification by the principals.}}

To mark the difference between two causes of action; to distinguish.