One / Unity in Dreams: Meaning in Depth Psychology
One is the whole before anything divides. It can mean unity, a beginning, or standing alone. Whether the aloneness feels like wholeness or isolation is usually the dream's real question.
THE CORE MEANING
The undifferentiated whole, the beginning, unity before division. The Self before individuation creates differentiation. Also: isolation, singularity, the ego alone.
CONNECTS TO
All of that is the universal meaning. But what does one / unity mean to you? Your personal association matters more than any dictionary.