What does "city hall" mean?

The building that houses a city's government.

City hall

Common synonyms include: american party, anti-monopoly party, bull moose party, camp, capitol, city administration.

/ˈsɪti ˌhɔl/ name, noun

name, noun ·Moderate ·College level

Noun

1
The building that houses a city's government.
"Near-synonym: town hall"
2
a building that houses administrative offices of a municipal government wordnet
3
The city government (city council, mayor, etc.); government in general. figuratively, metonymically
"Near-synonym: town hall"

Proper Noun

1
Any specific city hall, which in context (i.e., discussions within its city or about its city) is called by this name, written in capital letters.

"A new city hall was built after the big fire of 1883."

By proprialization from city hall.