Singleness

noun

1. The state or character of being single, in any sense of the word.
2. The quality or state of being single, or separate from all others; the opposite of doubleness, complication, or multiplicity.
3. Freedom from duplicity, or secondary and selfish ends; purity of mind or purpose; simplicity; sincerity.

   "singleness of purpose; singleness of heart"

4. The property of being single.
5. The result or product of being single.