deputy
     n 1: someone authorized to exercise the powers of sheriff in
          emergencies [syn: {deputy sheriff}]
     2: an assistant with power to act when his superior is absent
        [syn: {lieutenant}]
     3: a member of the lower chamber of a legislative assembly
        (such as in France)
     4: a person appointed to represent or act on behalf of others
        [syn: {surrogate}]
Source: WordNet® 2.0