'Imperialist' definitions:

Definition of 'imperialist'

From: WordNet
adjective
Of or relating to imperialism; "imperialistic wars" [syn: imperialistic, imperialist]
noun
A believer in imperialism

Definition of 'Imperialist'

From: GCIDE
  • Imperialist \Im*pe"ri*al*ist\, n. [Cf. F. imp['e]rialiste.] One who serves an emperor; one who favors imperialism. [1913 Webster]