IPA: /ˌtɛrɪˈtɔːrɪəli/
KK: /tɛrɪˈtɔriəli/
In a way that relates to a specific area or region, often concerning ownership or control.
The animals marked their territory territorially to warn others.
Territorially → It is formed from "territorial" (from Latin "territorium", meaning land or territory) and "-ly" (meaning in a manner of). The word "territorially" means in a manner relating to land or territory.
Think of 'territory' as relating to land, and the '-ly' indicates a manner. So, when you hear 'territorially', imagine something being done in relation to land.