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

The palate is supple and slightly creamy, with vibrant acidity and fresh cane character that lend fruity and herbal notes. —Joseph V Micallef, Forbes.com, 17 May 2026

Most recipes also include honey to balance out the acidity, and some add ginger or lemon for additional flavor. —Sarah Anzlovar, Verywell Health, 17 May 2026

Remarkably cool September nights kept sugar levels balanced while maintaining freshness and acidity, allowing for a notable sense of equilibrium in the glass. —Mike Desimone, Robb Report, 15 May 2026

More research is needed to calculate microbial cities’ full influence on ocean acidity because dissolved calcite can counteract the carbonic acid to an extent. —Damien Pine, Scientific American, 15 May 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