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

Collins recommends the George IV, O'Henry, Rio Oso Gem, Suncrest, and Silver Logan for peaches, and singles out the Snow Queen nectarine for its balance of sweetness and acidity. —Rachel Silva, Martha Stewart, 25 Apr. 2026

For this cleaning method, a combination of vinegar and baking soda is best because of the acidity and abrasiveness of the ingredients. —Ashlyn Needham, Southern Living, 18 Apr. 2026

The texture is lean, taut, and refreshing, with moderate acidity. —Joseph V Micallef, Forbes.com, 18 Apr. 2026

Generally speaking Riesling, Gewürztraminer, and Pinot Gris from Alsace are dry, but even those with higher residual sugar exhibit vivid acidity that keeps them from seeming overly sweet. —Jeremy Repanich, Robb Report, 17 Apr. 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