Common SERGEANT, an officer in the city of London, who attends the lord mayor and court of aldermen on court days, and is in council with them on all occasions, within and without the precincts or liberties of the city. He takes care of orphans' estates, either by taking account of them, or by signing their indentures, before these pass the lord mayor and court of aldermen; and he likewise lets and manages the orphan estates, according to his judgment, to the best advantage.