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.
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 Kristen Scott Thomas, an actress who drips contempt with the acidity of a xenomorph’s blood, doesn’t want to waste time on Roddy’s romantic delusion. Scott Tobias, Vulture, 8 Oct. 2025 There’s lingering minerality in the post-palate with a bright burst of acidity in the finish. Mike Desimone, Robb Report, 7 Oct. 2025 According to the report, ocean acidification – where the water's pH, a measure of its acidity or alkalinity, is lowered due to excess carbon dioxide - is the newest boundary broken and for the first time has reached dangerous levels. Abc Climate Unit, ABC News, 7 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 20 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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