imperialism
noun
im·pe·ri·al·ism
| \ im-ˈpir-ē-ə-ˌli-zəm
\
\
Definition of imperialism
1
: imperial government, authority, or system
2
: the policy, practice, or advocacy of extending the power and dominion of a nation especially by direct territorial acquisitions or by gaining indirect control over the political or economic life of other areas
broadly
: the extension or imposition of power, authority, or influence
union imperialism