mount guard

mount guard

To watch over someone or something; to act as a guard or a lookout for someone or something. He mounted guard outside the bathroom to make sure no one walked in on Jeremy getting sick. The police are mounting guard around the prison, lest the prisoner should attempt escape a second time.
See also: guard, mount
Farlex Dictionary of Idioms.

mount/stand/keep ˈguard (over somebody/something)

act as a guard: Two soldiers stood guard over the captured weapons.
See also: guard, keep, mount, stand
Farlex Partner Idioms Dictionary
See also:
  • keep guard
  • mount
  • mount/stand/keep guard
  • stand guard
  • guard (someone or something) from (someone or something)
  • guard from
  • take (one) by surprise
  • take by surprise
  • take somebody by surprise
  • bellow out
References in classic literature
Then it became the turn of Athos, Porthos, and Aramis to mount guard with D'Artagnan when he was on duty.
"I am very proud to be a member of the Household Division and to be the first Sikh Guardsman to mount guard in a turban will be the best thing in my life, especially as a member of the Scots Guards.
The Scots Guardsman had earlier said that being the first Sikh to mount guard in a turban would be the 'best thing in his life'.
They mount guard with the prohibitive words on the back of their uniforms.
Soliders used to taking on the Taliban will now mount guard posts and carry out bag searches for Olympic spectators.
Surely the council realises that if the shelter goes the villagers, however determined, will not be able to mount guard in this weather.
Sentries will mount guard with bayonets fixed, and magazines charged.
CONGRATULATIONS to Carole Lawrence from Preston, Lancs, for her caption to our picture, right, of one of the first women soldiers to mount guard at Windsor Castle dropping off in the heat.
The number of Welshmen transferring from other regiments made it possible for the 1st Battalion to mount Guard at Buckingham Palace three days later on St.