noun, adjective, red⋅der, red⋅dest.| 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 initial capital letter ) a radical leftist in politics, esp. a communist. |
| 4. | Informal. 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. | of the color red. |
| 8. | having distinctive areas or markings of red: a red robin. |
| 9. | of or indicating a state of financial loss or indebtedness: the red column in the ledger. |
| 10. | radically left politically. |
| 11. | (often initial capital letter ) communist. |
| 12. | of, pertaining to, or characteristic of North American Indian peoples: no longer in technical use. |
| 13. | in the red, operating at a loss or being in debt (opposed to in the black ): The newspaper strike put many businesses in the red. |
| 14. | paint the town red. paint (def. 16). |
| 15. | see red, Informal. to become very angry; become enraged: Snobs make her see red. |
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