—n. 1. any of various colors resembling the color of blood; the primary color at one extreme end of the visible spectrum, an effect of light with a wavelength between 610 and 780 nm.
2. something red.
3. (often cap.) a radical leftist in politics, esp. a communist.
4. Informal.See red light (def. 1).
5. Informal.red wine: a glass of red. 6. Also called red devil, red bird.Slang.a capsule of the drug secobarbital, usually red in color.
7. in the red, operating at a loss or being in debt (opposed to in theblack): The newspaper strike put many businesses in the red. 8. paint the town red. See paint (def. 16).
9. see red,Informal.to become very angry; become enraged: Snobs make her see red.
—adj. 1. of the color red.
2. having distinctive areas or markings of red: a red robin. 3. of or indicating a state of financial loss or indebtedness: the red column in the ledger. 4. radically left politically.
5. (often cap.) communist.
6. of, pertaining to, or characteristic of North American Indian peoples: no longer in technical use.