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

Household vinegar does the hard work for you since its acidity cuts through soap scum and mineral deposits. —Karen Brewer Grossman, Southern Living, 20 June 2026

If buying bread specifically for croutons, think of the loaf as the first seasoning decision—sourdough brings acidity, ciabatta brings crunch, brioche brings richness, and each will behave differently in the pan. —Anne Wolf, Martha Stewart, 18 June 2026

Each composition balances flavors -- acidity, freshness and texture -- showing how a wine pairing begins with the fundamental taste relationships between ingredients. —Cecilia Rodriguez, Forbes.com, 18 June 2026

Here, fresh pineapple brings brightness and natural acidity, while a combination of cream of coconut and coconut milk delivers bold coconut flavor without tipping the drink into candy-sweet territory. —Brad Leone, Bon Appetit Magazine, 17 June 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