n red color or pigment; the chromatic color resembling the hue of blood
n a tributary of the Mississippi River that flows eastward from Texas along the southern boundary of Oklahoma and through Louisiana
n emotionally charged terms used to refer to extreme radicals or revolutionaries
n the amount by which the cost of a business exceeds its revenue
n. [俚]红胶丸（安眠药的俚称）；红色的物品（red的复数）