Noun
(chiefly historical) Any of various types of city of Europe from classical to modern times, characterised by relative autonomy and/or being responsible only and directly to a king or emperor; a more modern city of such type, sometimes elsewhere than in Europe.
A special economic zone.
Source: en.wiktionary.orgAfter the fall of the kingdom of Macedon in 168 BC, Thessalonica became a free city of the Roman Republic under Mark Antony in 41 BC. Source: Internet
As a free city, Cologne was a sovereign state within the Holy Roman Empire and as such had the right (and obligation) to maintain its own military force. Source: Internet
At the end of the First Punic War it was a free city allied with Rome. Source: Internet
Hermann Rauschning was the president of the Free City of Danzig in Germany from 1933 to 1934. Source: Internet
Thorn remained a free city, now under the patronage of the Polish king. Source: Internet