- the act of leaving secretly or without explanation
- the event of passing out of sight
- gradually ceasing to be visible
- ceasing to exist;
- "he regretted the disappearance of Greek from school curricula"
- "what was responsible for the disappearance of the rainforest?"
- "the disappearance of resistance at very low temperatures"
disappearance is not a valid Scrabble word
disappearance is not valid in Words With Friends