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 of acidity

• 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

Remove summer weeds, till the ground and test the soil acidity to adjust if needed. — Tom MacCubbin, The Orlando Sentinel, 1 Aug. 2026

The soy sauce seasons the tofu to its core, while balsamic vinaigrette adds acidity, richness, and just enough sweetness. — Ali Francis, Bon Appetit Magazine, 29 July 2026

Algieri says Chablis typically features high acidity, strong mineral character, and is un-oaked or lightly oaked, but many of her clients are more familiar with Chardonnay having a rounder, buttery style driven by vanilla from heavy oak aging. — Mike Desimone, Robb Report, 26 July 2026

In this cocktail from Nguyen, Japanese rice vinegar’s gentle acidity brightens the drink without overpowering the other ingredients. — Jillian Dara, Forbes.com, 21 July 2026

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