murk·y / ˈmərkē/ • adj. (murk·i·er, murk·i·est) dark and gloomy, esp. due to thick mist: the sky was murky and a thin drizzle was falling. ∎ (of liquid) dark and dirty; not clear: the murky silt of a muddy pond. ∎ not fully explained or understood, esp. with concealed dishonesty or immorality: the murky world of espionage.DERIVATIVES: murk·i·ly adv.murk·i·ness n.