solidity

noun

so·​lid·​i·​ty sə-ˈli-də-tē 

plural solidities

1

: the quality or state of being solid

2

: something solid

Synonyms of solidity

• reliability
• reliableness

Examples of solidity in a Sentence

The solidity of his convictions impressed us.

the solidity of his word is such that I don't need a written contract—or anything else

Recent Examples on the Web

This financial solidity is a noteworthy strength. —Trefis Team, Forbes.com, 21 Jan. 2026

Ultimately, such consistency is grounded in the solidity of the gallerists who shape Conduit’s vision. —Benjamin Lima special Contributor, Dallas Morning News, 17 Jan. 2026

Their solidity has, until now, prevented the Islamic Republic’s collapse. —Karim Sadjadpour, The Atlantic, 10 Jan. 2026

There are no bounds, there’s no guidelines, which leaves everything open to possibility and change and solidity and just being comfortable in that lack of definition. —Lisa Deaderick, San Diego Union-Tribune, 20 Dec. 2025

Word History

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for solidity

• acidity
• aridity
• avidity
• cupidity
• fluidity
• humidity
• liquidity
• lucidity
• morbidity
• placidity
• rancidity
• rapidity

Kids Definition

solidity

noun

so·​lid·​i·​ty sə-ˈlid-ət-ē 

plural solidities

1

: the quality or state of being solid

2

: something solid