SOLIDITY

solidity, solidness

(noun) the quality of being solid and reliable financially or factually or morally; “the solidity of the evidence worked in his favor”; “the solidness of her faith gave her enduring hope”

solidity, solidness

(noun) the consistency of a solid

solidity

(noun) state of having the interior filled with matter

Source: WordNet® 3.1

Etymology

Noun

solidity (countable and uncountable, plural solidities)

The state or quality of being solid.

Moral firmness; validity; truth; certainty.

(geometry) The solid contents of a body; volume; amount of enclosed space.

Synonyms

• compactness

• consistency

• density

• fullness

• hardness

• massiveness

• solidness

• soundness

• strength

Antonyms

• fluidity

• hollowness

• instability

• openness

• weakness

Source: Wiktionary

So*lid"i*ty, n. Etym: [L. soliditas: cf. F. solidité.]

1. The state or quality of being solid; density; consistency, -- opposed to fluidity; compactness; fullness of matter, -- opposed to openness or hollowness; strength; soundness, -- opposed to weakness or instability; the primary quality or affection of matter by which its particles exclude or resist all others; hardness; massiveness. That which hinders the approach of two bodies when they are moving one toward another, I call solidity. Locke.

2. Moral firmness; soundness; strength; validity; truth; certainty; - - as opposed to weakness or fallaciousness; as, the solidity of arguments or reasoning; the solidity of principles, triuths, or opinions.

3. (Geom.)

Definition: The solid contents of a body; volume; amount of inclosed space.

Syn.

– Firmness; solidness; hardness; density; compactness; strength; soundness; validity; certainty.

Source: Webster’s Unabridged Dictionary 1913 Edition