IPA: //ˌsɜːrkəmˈskrɪpʃən//
KK: /sɜrkəmˈskrɪpʃən/
The act of limiting or restricting something, or the area that is limited.
The circumscription of the park ensures that no buildings can be constructed nearby.
Circumscription is formed from "circum-" (meaning around) and "scriptio" (meaning writing). The word refers to the act of writing around or defining the limits of something.
Think of 'writing around' ('circum-') to define boundaries — that's what circumscription means.