1. The quality or state of being one; singleness or wholeness.

2. Singularity; uniqueness.

3. A state or condition of perfect harmony or accord: "He intuited global truths. He thrilled at his oneness with humanity" (Sally Jacobs).

4. Sameness of character: the disagreeable oneness of roadside landscapes.

5. Unison; agreement: oneness of mind and purpose.