Meaning of Red holes
Unknown / অজানা / अज्ञात
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 nanometers.
(often initial capital letter) Older Slang: Usually Disparaging. a radical leftist in politics, especially a Communist.
Informal. red light (def 1).
Informal. red wine: a glass of red.