im·pe·ri·al·ism /ɪmˈpɪriəˌlɪzəm/
 帝國主義,帝制
 Im·pe·ri·al·ism n.
 1. The power or character of an emperor; imperial authority; the spirit of empire.
    Roman imperialism had divided the world.   --C. H. Pearson.
 2. The policy, practice, or advocacy of seeking, or acquiescing in, the extension of the control, dominion, or empire of a nation, as by the acquirement of new, esp. distant, territory or dependencies, or by the closer union of parts more or less independent of each other for operations of war, copyright, internal commerce, etc.    The practise of building or extending an empire.
    The tide of English opinion began to turn about 1870, and since then it has run with increasing force in the direction of what is called imperialism.    --James Bryce.
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 imperialism
      n 1: a policy of extending your rule over foreign countries
      2: a political orientation that advocates imperial interests
      3: any instance of aggressive extension of authority