What does "principal city" mean?

Synonym of central city (“the main city of a metropolitan area; particularly one containing multiple cities”).

What is a synonym for "principal city"?

Common synonyms include: bishkek, capitale, capitals, tashkent.

noun

noun ·Rare ·Advanced level

Noun

1
Synonym of central city (“the main city of a metropolitan area; particularly one containing multiple cities”).
2
Used other than figuratively or idiomatically: see principal, city.

From principal + city.