the.com/prime minister

means The head of government in a parliamentary system, chosen (directly or indirectly) from the legislature and governing with its confidence rather than by fixed personal mandate.

from Straightforward Latin-via-French construction: 'prime' from primus, 'first,' and 'minister' from minister, originally 'servant' or 'attendant' (itself built from minus, 'less,' marking one who serves rather than rules). So the title literally means 'first servant' — the chief of the king's ministers, the ones who did the administering while the monarch reigned. The role grew out of English and other European courts where a monarch's leading minister gradually accumulated enough standing to become the de facto head of government, even though the term started as faintly self-effacing rather than grand.