mount guard

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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

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
References in periodicals archive ?
Morsi supporters camping on the streets of Cairo were stocking up on bandages and syringes Thursday and mounting guard with barricades, helmets and sticks.
THE 1st Battalion Welsh Guards will be mounting guard at some of London's most historic locations this year, including Buckingham Palace, St James's Palace and Windsor Castle.
The police did nothing to protect her but are now mounting guard over the family alleged to have been responsible because they have received threats from a horrified public.
The police did nothing to protect her, but are now mounting guard over the family alleged to have been responsible because they have received threats from a horrified public.
The Guards Division, in their distinctive scarlet tunics and bearskin hats, usually perform the mounting guard duty, but when units are busy with operational duties, other regiments step in.
Mounting guard duty is normally carried out by the Guards of Household Division in their distinctive scarlet tunics and bear skin caps, but when the Guards units are busy with operational duties other regiments step in.