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1. The consistency of a solid
   - solidness
    
2. State of having the interior filled with matter
    
3. The quality of being solid and reliable financially, factually or morally
   "the solidity of the evidence worked in his favour";
   - solidness

Derived forms: solidities

See also: hollow, solid

Type of: body, consistence, consistency, dependability, dependableness, fullness, fulness, reliability, reliableness, substance

Antonym: hollowness

Encyclopedia: Solidity