the mounted squadrons supplied by the Household Cavalry for ceremonial duties
2.
their headquarters in Whitehall, London: also the headquarters of the British Army
Horse Guards in American English
plural noun
1.
a body of cavalry serving as a guard
2.
a cavalry brigade from the household troops of the British monarch
Word origin
[1635–45]This word is first recorded in the period 1635–45. Other words that entered Englishat around the same time include: domesticate, intaglio, linear, recruit, sympathetic