Definitions

1. adjective

not relating to or characteristic of an empire or empires

“The historian studied the unimperial aspects of the ancient city-state’s foreign policy.”

2. adjective

not imperial in character, extent, or degree; non-monarchic

“The unimperial form of government was favored by the local population.”

3. noun

something that is not imperial in character, extent, or degree; non-monarchic entity

“The unimperial system of local governance was implemented to replace the former imperial regime.”