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| 1. | the policy of extending the rule or authority of an empire or nation over foreign countries, or of acquiring and holding colonies and dependencies. |
| 2. | advocacy of imperial interests. |
| 3. | an imperial system of government. |
| 4. | imperial government. |
| 5. | British. the policy of so uniting the separate parts of an empire with separate governments as to secure for certain purposes a single state. |
Acquisition by a government of other governments or territories, or of economic or cultural power over other nations or territories, often by force. Colonialism is a form of imperialism.