one-party dictatorship; single-party rule system
Political term referring to a system where only one political party is allowed to hold power.
That country operates under a one-party dictatorship.
独裁政治 is a broader term for dictatorship or autocracy, not necessarily limited to a single-party system.
一党制 is a more neutral term for a one-party system, while 一党独裁制 emphasizes the dictatorial nature.
Compound of 一党 (one party), 独裁 (dictatorship), and 制 (system).