prime minister is a noun meaning "the person who holds the position of head of the government in the United Kingdom". It carries 2 recorded senses.
the person who holds the position of head of the government in the United Kingdom
the person who is head of government (in several countries)
Definitions, synonyms and semantic relations for prime minister come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.