Noun

1. Any collection of particles (e.g., smoke or dust) or gases that is visible
2. A visible mass of water or ice particles suspended at a considerable altitude
3. Out of touch with reality
4. A cause of worry or gloom or trouble
5. Suspicion affecting your reputation
6. A group of many things in the air or on the ground

Verb

1. Make overcast or cloudy
2. Make less visible or unclear
3. Billow up in the form of a cloud
4. Make gloomy or depressed
5. Place under suspicion or cast doubt upon
6. Make less clear
7. Colour with streaks or blotches of different shades
8. Make milky or dull