Decay dream meaning is explained below using 11 different sources. Each interpretation is shown with its source.

Interpretation 1 — Martha Clarke

Psychologically, putrefaction is the destruction of mental debris that obstruct spiritual evolution. Putrefaction, then, transmits the idea of new life that comes after the decay. Do not forget that in order for something new to rise, a breakdown of the old is required. This dream may seem harrowing but it actually transmits high hopes to the protagonist.
Source: The Big Dictionary of Dreams Author: Martha Clarke

Interpretation 2 — Versatile - Anonymous

Psychological / emotional perspective: When something is decaying it is running out of energy.

For it to appear in dreams indicates we must be prepared to allow things to run their natural course. Putrefaction is when the process of decay has gone past the point of no return.

Source: Dream Meanings of Versatile Author: Versatile - Anonymous

Interpretation 3 — Dream Explanations - Anonymous

Dreams of decay symbolize that you have allowed an aspect of your upkeep to slip. Perhaps you have allowed negative thoughts and/or behavior to fester. Your subconscious mind is alerting you take care of yourself and take the action necessary to bring you back into balance.
Source: Strangest Dream Explanations Author: Dream Explanations - Anonymous

Interpretation 4 — Versatile - Anonymous

Material aspects: In mundane terms, we have a situation in our lives – perhaps a work project or a relationship – that has come to a natural conclusion and does not need to be nurtured.

The experience we have gained, however, can be put to good use.

Source: Dream Meanings of Versatile Author: Versatile - Anonymous

Interpretation 5 — James R. Lewis and Evelyn Dorothy Oliver

Decay may symbolize the degradation of a situation. More positively, it represents the death of an old situation before rebirth into a new state. Other associations come from such common idioms as “rotten apple.” (See also Maggots).
Source: Dream Symbols in The Dream Encyclopedia Author: James R. Lewis and Evelyn Dorothy Oliver

Interpretation 6 — Garuda

See Demolition, Rubble, Ruins. Deceased

Vision: Seeing a deceased person: the person has your best interests at heart and wants to tell you something that will support you.

See Death.

Source: Dreamers Dictionary Author: Garuda

Interpretation 7 — Betty Bethards

Negative thinking; unhealthy parts of self. Talents and abilities wasting away through lack of use. Examine, clean up, awaken to own potential, change to positive.
Source: The Dream Books Symbols Author: Betty Bethards

Interpretation 8 — Versatile - Anonymous

Decay in dreams is evidence of the natural cycle of life: growth, decline and regeneration. Out of decay comes new growth and knowledge.
Source: Dream Meanings of Versatile Author: Versatile - Anonymous

Interpretation 9 — Stearn Robinson - Tom Corbett

Whatever the nature of the decayed material, this dream is telling you that you’ve got some stormy weather ahead.
Source: The Complete Guide to Interpreting Your Dreams Author: Stearn Robinson - Tom Corbett

Interpretation 10 — Margaret Hamilton

The final result of gradual neglect, literally and spiritually
Source: Dream Dictionary Unlimited Author: Margaret Hamilton

Interpretation 11 — Vincent Wienand

1. Eternal death;

2. Perish; Acts 2:27.

Source: Dream Dictionary The Biblical Model Author: Vincent Wienand