centaureaPronunciation: /sɛnˈtɔːrɪə, ˌsɛntəˈriːə/Definition of centaurea noun a plant of a Eurasian genus which includes the cornflower and knapweed. Genus Centaurea, family Compositae Origin:modern Latin based on Greek kentauros ‘centaur’ (see centaury)centaurea in other Oxford dictionaries Definition of centaurea in the US English dictionary