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

Crudo but not crudo, salad but not salad, a gorgeous rummage of ingredients popping off flashbulb-bright acidity. — Bill Addison, Los Angeles Times, 24 Sep. 2026

Sourdough bread stays fresh longer than yeast bread due to its natural acidity, but is best consumed within 48 hours. — Karla Walsh, Better Homes & Gardens, 19 Sep. 2026

The beef is ultra savory and deeply spiced with chili powder and cumin, while tomatoes and black beans add body and gentle acidity to the filling. — Alana Al-Hatlani, Southern Living, 16 Sep. 2026

It’s also commonly used in dressings and marinades due to its acidity. — Lauren O'Connor, HEALTH, 14 Sep. 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