deputy

♦♦ depu|ty /d'epjʊti/ (deputies)
1 [N-COUNT] oft N n
A deputy is the second most important person in an organization such as a business or government department. Someone's deputy often acts on their behalf when they are not there.
...Jack Lang, France's minister for culture, and his deputy, Catherine Tasca.
2 [N-COUNT]
In some parliaments or law-making bodies, the elected members are called deputies.