The word "municipal" means having to do with a city or its government. It is an adjective that describes anything related to the governing body of a city, town or community.
The word "municipal" can be used in a sentence as follows: "The man had to go to municipal court to dispute the speeding ticket he had received." Municipal in its adverb form is "municipally." Another example of the word "municipal" in a sentence is, "Next year's municipal elections will allow the citizens of St. Louis to decide on several important issues such as garbage collection, tax rates and school bonds."