alderman
al·der·man
/ˈɑːldɚmən/ noun , pl -men /-mən/ [ count ]
1 : a member of a city government in the U.S., Canada, and Australia
the board of aldermen
2 : a senior member of an English town, county, or borough council who is elected by the other members — not used officially in Britain after 1974
al·der·man·ic /ˌɑːldɚˈmænık/ adj