Meaning

• A rock; boulder; a hill.

• A visible mass of water droplets suspended in the air.

• Any mass of dust, steam or smoke resembling such a mass.

• Anything which makes things foggy or gloomy.

• Anything unsubstantial.

• A dark spot on a lighter material or background.

• A group or swarm, especially suspended above the ground or flying.

  "He opened the door and was greeted by a cloud of bats."

• An elliptical shape or symbol whose outline is a series of semicircles, supposed to resemble a cloud.

  "The comic-book character's thoughts appeared in a cloud above his head."

• (with "the") The Internet, regarded as an abstract amorphous omnipresent space for processing and storage, the focus of cloud computing.

• A negative or foreboding aspect of something positive: see every cloud has a silver lining or every silver lining has a cloud.

• Crystal methamphetamine.

• A large, loosely-knitted headscarf worn by women.

Meaning

• To become foggy or gloomy, or obscured from sight.

  "The glass clouds when you breathe on it."

• To overspread or hide with a cloud or clouds.

  "The sky is clouded."

• To make obscure.

  "All this talk about human rights is clouding the real issue."

• To make less acute or perceptive.

  "The tears began to well up and cloud my vision."

• To make gloomy or sullen.

• To blacken; to sully; to stain; to tarnish (reputation or character).

• To mark with, or darken in, veins or sports; to variegate with colors.

  "to cloud yarn"

• To become marked, darkened or variegated in this way.