Definition from macmillandictionary.com
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Dave said good night to everyone and quickly disappeared upstairs.
The moon disappeared behind the clouds.
She was still waving as the train disappeared from view.
The symptoms should disappear within a few days.
The letter I had left on my desk had disappeared.
the thousands of people who have disappeared in the war
She disappeared from a London hotel on Monday and has not been seen since.
The couple disappeared without trace while on holiday in France.
...speculation has been circulating that Mr Gao may have been 'disappeared' by security forces because of his anti-government activity...