noun

1. A small annual plant in the family Asteraceae, Centaurea cyanus, usually with bushy blue flowers which grows natively in European cornfields (i.e. wheatfields).

2. A plant of the species Cichorium intybus.

3. Cornflower blue.

Synonyms: bachelor's button, bluebottle, chicory button, common chicory, horseweed, ragged sailor, succory

adjective

1. Of a blue colour, as that of the cornflower; cornflower blue.