If you heard a whispered conversation or whispers, do you fear that others may be gossiping about you or keeping a secret from you? Or if you saw someone else whispering in another person’s ear, do you feel excluded in some way from their closeness in waking life? If you overheard but were not a part of a conversation, does this emphasize your sense of being excluded? Whistle, sound of: A signal to take action or an affirmation of life as in the old superstition of whistling as you pass a grave. [1]
A whisper in a dream may also imply that the message that is on its way to you is not yet ready to be heard and understood or ready for public dissemination.
A process may be incomplete. [2]
Thoughtfulness (so as not to bother or wake someone).
Someone or something you perceive as secretive, discreet, stealthy, or hiding something.
Caution (or feeling a need for it).
Wanting to get someone’s attention.
A subtle message (whether in spoken, written, or body language).
It’s better to repress than to repent [4]