circumscribe

To draw a line around; to encircle.

To limit narrowly; to restrict.

"Well, I promise you to circumscribe her conquests as much as possible by extending my own," returned Henrietta. "It will be an easy task; for Miss Churchill does not do 'the honours of her eyes.' I often tell her her beauty is quite wasted upon her."

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; […].

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