to circumscribe

1. to draw a line around; encircle:

to circumscribe a city on a map. 
fields circumscribed by tall trees

2. to enclose within bounds; limit or confine, especially narrowly:

Her social activities are circumscribed by school regulations. 
Their plans were circumscribed by a lack of money.
circumscribe your TV-watching time to one hour daily 
 
3. to mark off; define; delimit:

to circumscribe the area of a science.
a study of plant species in a circumscribed area
The hedge circumscribes the property. 


Source: http://www.dictionary.com/browse/circumscribe
 http://www.merriam-webster.com/dictionary/circumscribe
https://www.vocabulary.com/dictionary/circumscribe