adj. black·er,
black·est 1. Being of the color black, producing or reflecting comparatively little light and having no predominant hue.
2. Having little or no light: a black, moonless night.
3. also
Blacka. Of or belonging to a racial group having brown to black skin, especially one of African origin: the black population of South Africa.
b. Of or belonging to an American ethnic group descended from African peoples having dark skin; African-American.
4. Very dark in color: rich black soil; black, wavy hair.
5. Being a trail, as for skiing, marked with a sign having a black diamond, indicating a high level of difficulty.
6. Soiled, as from soot; dirty: feet black from playing outdoors.
7. Evil; wicked: the pirates' black deeds.
8. Cheerless and depressing; gloomy: black thoughts.
9. Being or characterized by morbid or grimly satiric humor: a black comedy.
10. Marked by anger or sullenness: gave me a black look.
11. Attended with disaster; calamitous: a black day; the stock market crash on Black Friday.
12. Deserving of, indicating, or incurring censure or dishonor:
"Man ... has written one of his blackest records as a destroyer on the oceanic islands" (Rachel Carson). 13. Wearing clothing of the darkest visual hue: the black knight.
14. Served without milk or cream: black coffee.
15. Appearing to emanate from a source other than the actual point of origin. Used chiefly of intelligence operations: black propaganda; black radio transmissions.
16. Disclosed, for reasons of security, only to an extremely limited number of authorized persons; very highly classified: black programs in the Defense Department; the Pentagon's black budget.
17. Chiefly British Boycotted as part of a labor union action.