Longman Dictionary of Contemporary English homepage

disappear

verb
     
dis‧ap‧pear S2 W2 [intransitive]
1 to become impossible to see any longer [= vanish; ≠ appear]
disappear behind/under/into etc
The sun had disappeared behind a cloud.
disappear from view/sight
David watched her car until it disappeared from view.
At this point the path seemed to disappear altogether (=disappear completely).
2 to be lost, or to become impossible to find [= vanish]:
The two girls disappeared while walking home from school.
My keys have disappeared again.
disappear without trace British English /without a trace American English (=without any way of finding them)
75,000 soldiers simply disappeared without trace.
3 to stop existing:
The rain forest may disappear forever.

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