Piauí
geographical name
Pi·auí
| \ pyau̇-ˈē
, pē-ˌau̇-\
, pē-ˌau̇-\
variants:
or formerly Piauhy
Definition of Piauí
state of northeastern Brazil bordering on the Atlantic Ocean east of the Parnaíba River; capital Teresina area 97,134 square miles (251,578 square kilometers), population 3,118,360