noun

• (obsolete) A rock; boulder; a hill.
• (figurative) Anything unsubstantial.
• (telecommunications) A telecom network (from their representation in engineering drawings).
• (cloud computing, with "the") The Internet, regarded as an abstract amorphous omnipresent space for processing and storage, the focus of cloud computing.
  "Now we are liberal with our innermost secrets, spraying them into the public ether with a generosity our forebears could not have imagined. Where we once sent love letters in a sealed envelope, or stuck photographs of our children in a family album, now such private material is despatched to servers and clouds operated by people we don't know and will never meet."

verb

• (intransitive) To become foggy or gloomy, or obscured from sight.
  "The glass clouds when you breathe on it."
• (transitive) To overspread or hide with a cloud or clouds.
  "The sky is clouded."
• (transitive) To make obscure.
  "All this talk about human rights is clouding the real issue."
• (transitive) To make less acute or perceptive.
  "Your emotions are clouding your judgement."