n. Any of numerous plants of the genus Papaver, having nodding buds with four crumpled petals, showy red, orange, or white flowers, a milky juice, and capsules that dehisce through terminal pores.n. Any of several similar or related plants, such as the California poppy.n. An extract from the sap of unripe poppy seedpods, used in medicine and narcotics.n. A vivid red to reddish orange.