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 acidity from limes or oranges can reduce PPO activity. —Maryna Holovnova, New Atlas, 13 Nov. 2025

The zest gives you lots of lemon flavor without the acidity of the juice. —Cameron Beall, Southern Living, 12 Nov. 2025

While the Zambian government acted swiftly to neutralize acidity and launch investigations, critics say its response has been too lenient and slow to hold the firm fully accountable. —Elisha Iragi, semafor.com, 10 Nov. 2025

Antacids, a common treatment for acid reflux, often contain calcium carbonate, which helps neutralize high acidity in the stomach. —Merve Ceylan, Health, 9 Nov. 2025

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