1. Without sufficient light, being dirty, and gloomy: The murky light in the cave made it difficult for the spelunkers to explore it.
2. Densely foggy or covered with a thick mist: A murky sky was hanging over the forest after the fire had been put out.
3. Muddied, difficult to see through because of sediment: Justin doesn't like to swim in the river because of its murky water.
4. Obscure or doubtful and specious: The speaker presented murky information in an effort to disguise the fact that he was not prepared for the debate.
5. Not clearly expressed or understood: The airline offered a murky explanation for the flight delay.
6. Suspicious, intended to deceive, or is hidden: As a politician, the candidate was suspected of having a murky past.
8. Darker and gloomier; especially, as a result of a thick mist: The sky was murkier than normal because of a thin drizzle which was falling and then later, it became the murkiest of nights as a result of the thick fog.
9. A descriptive term for someone or something exhibiting morally questionable behavior: Mike's political background made him a murkier government agent than the others who were running for office.