Murk/mɜːrk/ Definition 1 of 3Pro Tip 1/3Visual Impediment Used when visibility is hindered, not just any type of darkness. Lost in the murk of the unlit basement, I fumbled for a light switch. Pro Tip 2/3Natural Occurrences Often relates to mist or natural conditions rather than artificial settings. The hikers were wary of the descending murk at twilight. Pro Tip 3/3Emotional Atmosphere Can be used metaphorically to describe a gloomy or foreboding mood. The bad news cast a murk over the festivities.