How do you spell Vacuity

Available Definitions:
1)  n. - The quality or state of being vacuous, or not filled; emptiness; vacancy; as, vacuity of mind; vacuity of countenance.
2)  n. - Space unfilled or unoccupied, or occupied with an invisible fluid only; emptiness; void; vacuum.
3)  n. - Want of reality; inanity; nihility.