1. instances of someone or something ceasing to be visible or present; the act or fact of vanishing
2. cases in which a person goes missing and cannot be found or located

Examples

• The disappearances of several hikers in the national park sparked a major search effort.
• Magicians often use clever tricks to create the illusion of disappearances on stage.
• The sudden disappearances of the birds from the area worried local ornithologists.
• Police investigated the mysterious disappearances of valuable items from the museum.
• The disappearances occurred without any warning or explanation.
• Witnesses reported seeing strange lights before the disappearances began.