Disappointment dream meaning is explained below using 5 different sources. Each interpretation is shown with its source.

Interpretation 1 — myjellybean

To dream of disappointment reflects real-life experiences of being continually disappointed. Such dreams often reflect repressed disappointments accumulated over a period of time. You dream serves as an emotional outlet which can provide some relief from this stress.
Source: My Dream Interpretation Author: myjellybean

Interpretation 2 — Stearn Robinson - Tom Corbett

A real contrary one.

The dreamer is assured of success in the precise matter of the dreamed disappointment

Source: The Complete Guide to Interpreting Your Dreams Author: Stearn Robinson - Tom Corbett

Interpretation 3 — Gillian Holloway

The opposite may be expected if you dream of being disappointed in some project in which you are engaged.
Source: The Complete Dream Book Author: Gillian Holloway

Interpretation 4 — Internet Archive - Anonymous

To dream you are Disappointed assures the reader of success in the very matter dreamed about.
Source: Mystic Dream Book Author: Internet Archive - Anonymous

Interpretation 5 — Margaret Hamilton

Revealed in order to lessen or avert
Source: Dream Dictionary Unlimited Author: Margaret Hamilton