What does Vada mean in Latin?

Vada, a proper noun, means “a stronghold in”.

proper noun

Vada

Vada, ae, f.,

I. a stronghold in Gallia Belgica, in the country of the Batavi, Tac. H. 5, 20 sq.

Văda, ōrum, n.,

I. a city in Liguria, now Savona, Brut. ap. Cic. Fam. 11, 10, 3; called Vada Sabatia, Plin. 3, 5, 7, § 48.

Văda Volaterrana, ōrum, n.,

I. a port in Etruria south of Pisa, now Torre di Vado, Cic. Quint. 6, 24; Plin. 3, 5, 8, § 50.