acidity

noun

acid·​i·​ty ə-ˈsi-də-tē How to pronounce acidity (audio)
a-
plural acidities
1
: the quality, state, or degree of being acid
2
: the state of being excessively acid

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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Acidity Plays a Key Role The researchers found that the acidity (pH) levels of the cheeses were a decisive factor in whether or not the virus was able to endure within the the products. Lucy Notarantonio, MSNBC Newsweek, 24 Oct. 2025 From espresso to cold brew, coffee can be enjoyed in many different ways, but each type varies widely in terms of caffeine content, ingredients, nutrients, and acidity levels. Laura Schober, Health, 23 Oct. 2025 Mix equal parts white vinegar with water for a naturally effective solution against carpet beetles, thanks to the acidity. Kaitlyn Yarborough, Southern Living, 20 Oct. 2025 How to Serve It As Ever's 2024 Marlborough Sauvignon Blanc is best served well-chilled, ideally between 45°F and 50°F, to highlight its bright citrus notes and refreshing acidity. Elizabeth Fogarty, Better Homes & Gardens, 14 Oct. 2025 See All Example Sentences for acidity

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

Time Traveler
The first known use of acidity was in 1615

Cite this Entry

“Acidity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acidity. Accessed 28 Oct. 2025.

Kids Definition

acidity

noun
acid·​i·​ty ə-ˈsid-ət-ē How to pronounce acidity (audio)
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- How to pronounce acidity (audio)
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

More from Merriam-Webster on acidity

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