What does Flēvum mean in Latin?

Flēvum, a proper noun, means “Flevum (ancient Roman fort in Germania, Europe)”.

What is the genitive of Flēvum?

The genitive singular is Flēvī. Flēvum is neuter, second declension.

In classical Latin, [ˈfɫeː.wũː]; in ecclesiastical (church) Latin, [ˈflɛː.vum].

proper noun · neutersecond declension

Flēvum n sg (genitive Flēvī)

Classical[ˈfɫeː.wũː]Ecclesiastical[ˈflɛː.vum]

Flēvum, sc. castellum,

I. a fortress of the Frisii, west of the mouth of the Ems, now Flie or Flieland, Tac. A. 4, 72, v. Orell. ad h. l.