First Lord

American  

noun

British.

1. the head of a board commissioned to perform the duties of a high office of state.

   First Lord of the Admiralty.

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Etymology

Origin of First Lord

First recorded in 1805–15

Example Sentences

Lord Sandwich, First Lord of the Admiralty, donated four of the spears with other materials from Cook's voyage to Trinity, his former college.

From BBC

Wordsworth was also a protégé of the first Lord Lonsdale, who built Lowther Castle in the early 1800s.

From BBC

Mr Maskey served as Sinn Féin's first Lord Mayor of Belfast from 2002 to 2003.

From BBC

Also known as Aegon the Conqueror, he was the first Lord of the Seven Kingdoms who united the realm with the help of his sisters by displaying their Targaryen might and forcing the previously independent monarchs to bend their knee.

From Los Angeles Times

One friend of the chancellor told me: She was the First Lord of the Treasury, his job was to serve her.

From BBC