Definition of Keystone State in English:

Keystone State

Pronunciation /ˈkēˌstōn stāt/ /ˈkiˌstoʊn steɪt/

proper noun

informal
a name for Pennsylvania

Pronunciation

Keystone State

/ˈkēˌstōn stāt/ /ˈkiˌstoʊn steɪt/