Prime Minister pri·me·mi·nister very common noun 1. the person who holds the position of head of state in England SynonymsPrime MinisterPMpremier 2. the person who is head of state (in several countries) Synonymschancellorpremierprime minister Related words Broader terms head of state Parts British Cabinet WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.