Entry 1 sense Webster, 1913 Cornflower /(kôrn"flou`ẽr)/ · Corn·flow·er · IPA /ˈkɔɹnˌflaʊ.ɚ/ 01 n. A conspicuous wild flower (Centaurea Cyanus), growing in grainfields. 1. A conspicuous wild flower (Centaurea Cyanus), growing in grainfields.(Bot.)