Disappearance dream meaning is explained below using 3 different sources. Each interpretation is shown with its source.

Interpretation 1 — Tony Crisp

Depicts the way our conscious self relates to the unconscious. Memories, emotions or ideas suddenly ap­pear in awareness, but can disappear just as rapidly, some­times never to be seen again.

See vanish.

Source: A Guide to Dreams and Sleep Experiences Author: Tony Crisp

Interpretation 2 — Stearn Robinson - Tom Corbett

To be aware, in your dream, of the magical disappearance of yourself, others, and/ or material objects predicts that though you will soon be perplexed by a variety of problems you won’t be overcome by them.
Source: The Complete Guide to Interpreting Your Dreams Author: Stearn Robinson - Tom Corbett

Interpretation 3 — Martha Clarke

Dreaming of a missing person or object denotes repression, shyness, feelings of inferiority, and shame. In short: fear. Especially when the disappeared object has a sexual connotation.
Source: The Big Dictionary of Dreams Author: Martha Clarke