RIA(redirected from Rías)
Also found in: Medical, Encyclopedia.
(Physical Geography) a long narrow inlet of the seacoast, being a former valley that was submerged by a rise in the level of the sea. Rias are found esp on the coasts of SW Ireland and NW Spain
[C19: from Spanish, from rio river]
(Education) Royal Irish Academy
A drowned river valley, forming a long, narrow, funnelshaped inlet at right angles to the sea.