acidity

noun

acid·​i·​ty ə-ˈsi-də-tē 

a-

plural acidities

1

: the quality, state, or degree of being acid

2

: the state of being excessively acid

Synonyms

• bitterness
• bite
• edge

Examples of acidity in a Sentence

detected a certain acidity in the way he responded

the acidity of their relationship was well known to their mutual acquaintances

Recent Examples on the Web

Medium-bodied, with lovely freshness, very good acidity, textbook varietal purity and good persistence. —Tom Hyland, Forbes.com, 14 July 2025

This allows their crisp acidity and refreshing nature to really shine through. —Karla Walsh, Better Homes & Gardens, 12 July 2025

The acidity of Siegel’s original title has rarely made it into the comics, movies, or other properties starring the caped iteration. —Paul A. Thompson, Pitchfork, 11 July 2025

The roll is topped with lemon, chipotle aioli and dill resulting in a refreshing roll that balances acidity with creaminess. —Irene Milanez, Sacbee.com, 7 July 2025

Word History

Etymology

borrowed from French & Late Latin; French acidité, going back to Middle French, borrowed from Late Latin aciditāt-, aciditās, from Latin acidus "sour, acid entry 2" + -itāt-, -itās -ity

First Known Use

1615, in the meaning defined at sense 1

Rhymes for acidity

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

Kids Definition

acidity

noun

acid·​i·​ty ə-ˈsid-ət-ē 

a-

plural acidities

1

: the quality, state, or degree of being acid

2

: the state of being extremely acid

Medical Definition

acidity

noun

acid·​i·​ty ə-ˈsid-ət-ē, a- 

plural acidities

1

: the quality, state, or degree of being sour or chemically acid

the acidity of lemon juice

2

: the quality or state of being excessively or abnormally acid : hyperacidity