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

Avocado adds richness, cucumbers add crunch, and sweet, in-season tomatoes add a pop of bright acidity. —Josh Miller, Southern Living, 7 July 2025

In the last couple of decades, the region has proven that international varieties such as Chardonnay, Sauvignon Blanc, Pinot Grigio, and Pinot Noir flourish here, particularly at higher elevations where cool nights preserve acidity and aromatics. —Paul Caputo, Forbes.com, 3 July 2025

Fontina adds a light nutty funk, and pickled pepper slaw adds a pop of acidity. —Mackensy Lunsford, The Tennessean, 2 July 2025

The Gulf shrimp were sweet, and an apple-mango salsa and cilantro lime crema added just the right amount of acidity. —Keith Pandolfi, The Enquirer, 2 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