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

The grapes are able to retain their natural acidity thanks to the Okanagan’s hot, sunny days and cool nights. —Johanna Read, Forbes.com, 31 July 2025

The oil softens and moisturizes, the acidity of the vinegar breaks down residue and lifts grime, and the egg helps bind the mixture into a creamy consistency that stays put. —Gabi De La Rosa, Southern Living, 31 July 2025

Its components and acidity concentrations vary from product to product, and there is not enough research to determine an appropriate dosage for any specific health condition. —Ann Pietrangelo, Verywell Health, 28 July 2025

While there is a spicy kick, the variety of bold textures and flavors makes the perfect combination of fat, acidity and spice. —Irene Milanez, Sacbee.com, 28 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