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

Excellent, balanced acidity supports flavors of savory herbs, grapefruit pith, and tropical fruits. — Mike Desimone, Robb Report, 14 Aug. 2026

Salt and other flavorings also play their part, but acidity and fat are your foundation. — Los Angeles Times, 14 Aug. 2026

That texture was complemented by balanced sweetness and acidity and a zingy punch of garlic. — Sam Stone, Bon Appetit Magazine, 11 Aug. 2026

The existing method requires the acidity of the solution to be substantially reduced before the extraction can take place, and that adjustment can take approximately a week. — Bojan Stojkovski, Interesting Engineering, 10 Aug. 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