- cornflower (def. 1).
- a composite plant, Centaurea cyanus, having narrow leaves and blue flower heads.
- bluebottle fly.
- Portuguese man-of-war.
- another name for the blowfly
- any of various blue-flowered plants, esp the cornflower
- British an informal word for a policeman
- Australian and NZ an informal name for Portuguese man-of-war
