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 finish has a bright splash of acidity and an enduring feeling of warm spice. — Mike Desimone, Robb Report, 22 Oct. 2026 Use sparingly, as vinegar’s acidity can damage rubber gaskets over time. — Jolie Kerr, Better Homes & Gardens, 20 Oct. 2026 Red wine vinegar brings welcome acidity to BA’s Best Gazpacho, coq au vin, a pot of hearty lentils, and rich meat marinades. — Emily Saladino, Bon Appetit Magazine, 19 Oct. 2026 In Pommes d’Api, which is owned by the Minneapolis Institute of Art and was too fragile to bring to Paris, the brightness of Gonzalès’s reds and yellows convey the apples’ acidity. — Sarah Belmont, ARTnews.com, 19 Oct. 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 27 Oct. 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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