Disappearance

Noun

1. The action of disappearing or vanishing.

   "Wireless phone technology led to the disappearance of once-common coiled cords for telephone handsets."

2. Passing out of sight.

   "From the shore, they watched the disappearance of the ships' masts into the haze."

3. Leaving secretly of without explanation

   "The prosecuting attorney was concerned about the potential disappearance of witnesses."

4. Cessation of existence.