adjective
populous
PAHP-yuh-luhs/ˈpɑːpjələs/
Having a large population.
The populous neighborhood fills its balconies, windows, and shared entrance with residents.

Etymology
The pieces express “full of people.” Applied to a place, this describes an abundance of inhabitants, especially in relation to the area's size.
In context
Brooklyn is the most populous borough of New York City with over 2.7 million residents.
More examples
- India is a populous country.
- The coastal region is more populous than the dry interior.
- Bus service connects the city's most populous neighborhoods.
Forms
populous · more populous · most populous
population noun — All the people living in an area.