The crossword solution for the term 'wide domain' is 'EMPIRE'. An EMPIRE is a large, multi-ethnic state or group of states that are ruled by a single monarch or government. Empires have existed throughout history and have been formed through conquest, colonization, and other means. Empires typically have a large geographical area and a diverse population, and they often have a strong military presence. Empires have been used to expand the influence of a particular nation or culture, and they have also been used to consolidate power and resources.