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

Interpretation 1 — Stearn Robinson - Tom Corbett

This donkey sound, heard in a dream, is considered to be the fore runner of unpleasant (but not disastrous) news. How- ever, you must be sure the donkey was braying; if it was making any other sound, it mitigates the pre- diction to one of good news.

See also Donkey. 

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

Interpretation 2 — Internet Archive - Anonymous

You may expect to hear about the loss of an old friend if you hear a donkey Braying in your dream.
Source: Mystic Dream Book Author: Internet Archive - Anonymous

Interpretation 3 — Gustavus Hindman Miller

Hearing an ass bray, is significant of unwelcome tidings or intrusions.
Source: Ten Thousand Dream Interpretation Author: Gustavus Hindman Miller