There are 2 main definitions of ria in English:

ria1

Line breaks: ria
Pronunciation: /ˈriːə
 
/

noun

Geography
A long, narrow inlet formed by the partial submergence of a river valley.
More example sentences
  • Due to their nature, the rias or estuaries contain very peculiar ecosystems which often contain important amounts of fish.
  • The beaches that lie in some of the more protected rias have a warmer sea than those which are exposed, although water temperatures in Galicia never reach the heights found in the south of Spain.
  • Everyone in the busy tapas bar I ventured into was tucking into heaped platefuls of pulpo, Galicia's ‘national’ dish, scallops and tasty, but tough-to-open percebes, unique to the rias.

Origin

late 19th century: from Spanish ría 'estuary'.

Definition of ria in: