Wiktionary
party state
alt. A state in which power is held by a single political party. n. A state in which power is held by a single political party.
Usage examples of "party state".
Brunei might seem loose and informal, but it was still a one-party state under autocratic rule.
Technically I was running for the nomination for governor, because Sunshine is essentially a one-party state on the local level.
Behind what they say in public, they hate the church and democracy, intend to set up a one-party state and rule like the Nazis.
He'd never been an ideologue, after all, though poor old Alexandrov had thought him so, since Gerasi-mov had always been a Party man--well, what else could you be in a one-party state?