subzone
/ˈsʌbzɒn/; /ˈsʌbzɔːn/Definitions
1. noun
A smaller area within a zone, especially one designated for a particular purpose or function.
“The city was divided into several subzones for the festival, each with its own stage and attractions.”
2. verb
To divide or assign a part of a zone for a particular purpose or function.
“The government subzoned the area for residential and commercial development.”