serjeant at arms
/ˈsɑrdʒənt æt ɑrmz/
noun
- An officer in a legislative body (such as a parliament or congress) who is responsible for keeping order and security.
- The serjeant-at-arms announced the arrival of the speaker.
- In the House of Commons, the serjeant-at-arms carries a ceremonial mace.
- The serjeant-at-arms escorted the unruly member out of the chamber.