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 best wine for tailgating is often a crisp, dry rosé because of its versatility, refreshing acidity and ability to pair with a wide range of football season’s favorite finger foods. — Katie Kelly Bell, AJC.com, 20 Aug. 2026

There’s powerful minerality with a bright burst of delightful acidity in the finish. — Mike Desimone, Robb Report, 20 Aug. 2026

Continue cooking until the acidity of the raw tomato has been cooked out of the sauce. — Durrie Bouscaren, NPR, 20 Aug. 2026

The reaction was highly unpredictable and was influenced by variations in humidity, acidity, and individuals’ food and water intake. — Encyclopedia Britannica, 19 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