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
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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.
The acidity of the tomatoes will also help tone down the okra’s slimy mucilage. — Kirsten Nunez, Martha Stewart, 7 Aug. 2026 Notes like passionfruit, mango, and coconut can add creamy texture to a fragrance, while notes of blackcurrant, black cherry, and berries bring acidity, for example. — Alanna Martine Kilkeary, Glamour, 5 Aug. 2026 Its high acidity and bright red fruit cut through the rich texture of the baked salmon. — Carole Kotkin, Miami Herald, 5 Aug. 2026 Household vinegar is less likely to create long-term soil acidity issues than much stronger horticultural vinegar, which is 30% acetic acid. — Gemma Johnstone, The Spruce, 3 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 9 Aug. 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

Nglish: Translation of acidity for Spanish Speakers

Britannica.com: Encyclopedia article about acidity

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