Verb

(circumscrib)

To draw a line around; to encircle.

To limit narrowly; to restrict.

* {{quote-magazine, date=2013-06-07, author=David Simpson

, volume=188, issue=26, page=36, magazine=(The Guardian Weekly) , title= Fantasy of navigation , passage=It is tempting to speculate about the incentives or compulsions that might explain why anyone would take to the skies in [the] basket [of a balloon]: […]; perhaps to moralise on the oneness or fragility of the planet, or to see humanity for the small and circumscribed thing that it is; […].}}

(geometry) To draw the smallest circle or higher-dimensional sphere that has (a polyhedron, polygon, etc.) in its interior.

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.