(*A suit of armour made of linked metal rings or overlapping plates.)... Islamic Dream Interpretation
A white helmet in a dream means relaxing, or peace in one’s life, or it could mean recovering from a migraine headache. Wearing a warrior’s helmet in a dream also means safety of one’s property and protection from an accident. Wearing a rounded expensive helmet in a dream means betrothing a beautiful and a rich woman.
A helmet made of iron in a dream represents a leader who defends people, or it could mean trust, status, rank, a wife, or might. Wearing a white helmet in a dream means honor and protection of one’s property.... Islamic Dream Interpretation
If the former, it may have the same symbolism as the mask (see Mask) in that it prevents the wearer being seen.
If the latter, then it is a symbol of protection and preservation.
2- In olden times, the helmet was the attribute of the warrior or hero. Even today as with the motorcycle helmet it is still largely a representation of the masculine.
3- Protection by the Spiritual Self.... Ten Thousand Dream Dictionary
If the former, it may have the same symbolism as the mask in that it prevents the wearer being seen.
If the latter, then it is a symbol of protection and preservation.... Dream Meanings of Versatile
The type of helmet will be relevant, since there are now cycle and sports helmets – among others – which do not cover the face, but do protect the head, the seat of the intellect.... Dream Meanings of Versatile