Definition of: solidity

(sə·lid′ə·tē) noun plural ·ties
1. The quality or state of being solid; the property of occupying space; extension in the three dimensions of space; incompressibility.
2. Mental, moral, or financial soundness; substantial or reliable character or quality; firm standing; stability.
3. Aeron. The ratio of the total blade area of a rotor or propeller to the area of the disk swept by the blades.
4. Geom. Cubic contents; volume.