acidity

noun

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

Synonyms of acidity

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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.
Conduct a Soil Test Taking samples of the soil from several places in the lawn will provide information about soil acidity (pH), nutrient levels, and organic matter content. — Mary Marlowe Leverette, The Spruce, 29 Aug. 2026 Today’s recipe A basic vinaigrette is a balancing act between acidity and fat. — Jack Dolan, Los Angeles Times, 26 Aug. 2026 Adding water tempers the acidity and salt, allowing the chicken to marinate longer to pick up flavor without drying out or becoming over-seasoned. — Elizabeth Nelson, Southern Living, 26 Aug. 2026 Nerds are a four-in-one ingredient, adding not only flavor but additional sweetness, a vibrant color, and a touch of acidity to the syrup. — Bradleigh Mobley, Bon Appetit Magazine, 24 Aug. 2026 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

Rhymes for acidity

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Browse Nearby Words

acid indigestion
acidity
acidity coefficient
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Cite this Entry

“Acidity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acidity. Accessed 1 Sep. 2026.

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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

Britannica.com: Encyclopedia article about acidity

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