A signal from within that asks for attention to specifics, just as you might whistle up a taxi, or whistle to stop someone with whom you wish to speak.
Accusing or condemning someone whose responsibility in a situation has not yet been implied (e.g., “blowing the whistle on them”).
A way of lifting burdens, or a reflection of joy (e.g., “whistle a happy tune”).
A release or augmentation of power, specifically spiritual. In ancient times, it was believed that witches could whistle up the wind. [1]
2- A whistle may be heard and recognised in dreams about games f.Stt’ Games). As a means of controlling and training, it may be relevant as to how it is blown.
For instance if it is blown harshly, the dreamer may be being made aware that he has transgressed a known code of conduct.
3- A Spiritual summons. [2]
To dream that you are whistling, foretells a merry occasion in which you expect to figure largely. This dream for a young woman indicates indiscreet conduct and failure to obtain wishes is foretold. [3]
To clarify your interpretation consult the entries for games and musical instruments. [4]
To dream that you are whistling symbolizes joy and pleasure. [5]
2. If dreamer is whistling, it reflects happiness.
3. Warning.
4. Romantically attracted to someone. [7]