(programming) In C and C++, a preprocessor directive used in header files to prevent them from being included multiple times.

(UK) Alternative form of color guard

(military, Scouting) A uniformed group, especially of soldiers, police officers, Scouts, or school representatives, who present their institution's flag (and sometimes other flags) on ceremonial occasions.

plural of guard ship

a device placed on ships mooring ropes, pipes, cables, or posts to block the passage of rats and other creatures.

(Canada, US, slang, offensive) A person employed to look after people with mental disabilities.

To prevent something unpleasant from happening.

(rare) A mudguard which is attached at the back of a bicycle saddle.

To guard; to maintain a stance of vigilance in order to protect.

(Ghana) A vigilante who perpetrates assault and vandalism against land developers and their projects.