Definition of Imperialism is a policy of extending a country's power and influence through diplomacy or military force. Or you could use, rule by an emperor.
Examples of Imperialism throughout the world.
Domination of Finance, In the preface he wrote in 1920 for his book Imperialism, Lenin explained that capitalism turned into a world system in which a handful of “advanced countries” were financially strangling and oppressing a great majority of world population. Imperialism is indeed a system in which powerful capitalist countries dictate various economic terms to weaker countries and oppress them by different means. Tendency of capitalism to grow into a world economy realised itself particularly in the era of the rule of finance capital that gained an international character.
Imperialism is the empire of finance capital. Finance capital is superior to all other forms of capital and therefore a handful of major capitalist states which are powerful in finance capital are in a superior position to all other capitalist countries. In the imperialist period superiority reveals itself in the dominant and monopolist position of powerful finance capital groups in markets. However, in the foreword he wrote to Buharin’s work Imperialism and World Economy, dated 1915, Lenin defines the new ruler of 20th century as follows:
"Finance capital took over as the typical “lord” of the world; it is particularly mobile and flexible, particularly interknit at home and internationally, and particularly impersonal and divorced from the production proper; it lends itself to concentration with particular ease, and has been concentrated to an unusual degree already, so that literally a few hundred multimillionaires and millionaires control the destiny of the world."
Imperialism, Capitalism Technology and Science, The relationships between technology, development and Imperialism are enormous and are barely touched upon here. But it is clear now as it was to the Japanese in the 1860s that if a country does not equip its citizens with the latest technical knowledge of the West, across all the disciplines of science, there is no chance of resisting adequately. The dominance that technology provides to the West is not by itself a sufficient condition to resist, but it is undoubtedly a necessary one.
Trade and Investment as Imperialism, The epoch of world growth fueled by globalisation is over. Two giant free trade deals are being thrashed out which would place the United States at the centre of its own strategically drawn up domain, stretching from both sides of the pacific to Eastern Europe. But far from being a means to open up the world to a further intensification of trade and to liberate capitalism from its own fetters, these deals engineered by US imperialism in its own interests would carve up the world into two or more power blocs waging economic war with one another. It is protectionism masquerading as free trade.