aldermanate|ˈɔːldəməneɪt| [ad.med.L. aldermannātus, f.aldermannus after senatus, consulatus, etc. See -ate.] The office or dignity of alderman; the aldermen collectively. 1875Stubbs Const. Hist. III. xxi. 581 We must trace the existence of the aldermanate..to the ancient guild system.