solidity

Definitions

The quality or state of being firm, hard, or having a dense consistency.

The state of being solid rather than liquid or gaseous.

The quality of being reliable, sound, or well-founded.

Examples

The architect was impressed by the sheer solidity of the ancient stone walls.

His argument lacked the necessary solidity to convince the skeptical committee.

Synonyms

firmness hardness density stability sturdiness compactness rigidity

Antonyms

softness fragility instability porosity flimsiness weakness liquidity