D defs.my
Entry 1 sense Webster, 1913

Horse Guards

/(hôrs"gärdz`)/ · Horse· Guards · IPA
01 A body of cavalry so called; esp., a British regiment, called the Royal Horse Guards, which furnishes guards of state for the sovereign.
  1. 1.
    A body of cavalry so called; esp., a British regiment, called the Royal Horse Guards, which furnishes guards of state for the sovereign.(Mil.)
Phrases & compounds
The Horse Guards — a name given to the former headquarters of the commander in chief of the British army, at Whitehall in London.