acid·​i·​ty | \ ə-ˈsi-də-tē How to pronounce acidity (audio) , a-\
plural acidities

Definition of acidity

1 : the quality, state, or degree of being acid
2 : the state of being excessively acid

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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

In part because of the heat, acidity and obscured surface, then, Venus hasn’t enjoyed a sustained program of exploration over the past couple of decades. Paul K. Byrne, The Conversation, "Why we need to get back to Venus," 23 Aug. 2019 Also check the soil acidity and adjust to a pH of 6.5 if needed. Tom Maccubbin,, "Gardeners, start your tomatoes," 13 Aug. 2019 But the increased acidity seemed to reduce the effectiveness of the sodium silicate. Nick Corasaniti,, "Tainted water, ignored warnings, and a boss with a criminal past in Newark," 24 Aug. 2019 The marinade should come to a rolling boil and a temperature of at least 165 degrees F. Marinades with a lot of sugar in them might burn though, and marinades with a lot of acidity might change in flavor. NBC News, "How to marinate just about anything," 22 Aug. 2019 Not pasteurizing preserves some intensity of aromatics and more acidity. Jenn Harrisstaff Writer, Los Angeles Times, "A complete guide to sake from the sake guru at Ototo," 8 Aug. 2019 Oceans acidify in the blink of a geologic eye In the late 1700s, the oceans had equilibrated to be slightly alkaline, with a pH of about 8.1—roughly the same level of acidity as an egg white. Alejandra Borunda, National Geographic, "Ocean acidification, explained," 7 Aug. 2019 The wine has a nice bit of juicy acidity to accompany flavors of raspberries, rhubarb, menthol and orange peel. Michael Alberty | For The Oregonian/oregonlive,, "Columbia Gorge wineries release Eagle Creek Fire pinot noirs to raise funds for restoring hiking trails," 11 July 2019 Like a catchy summer bop, a bit of acidity brings sweet summer corn to life. Aliza Abarbanel, Bon Appétit, "The No-Brainer Corn Salad We’re Eating All Summer," 21 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'acidity.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of acidity

1615, in the meaning defined at sense 1

History and Etymology for acidity

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

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Statistics for acidity

Last Updated

11 Sep 2019

Look-up Popularity

Time Traveler for acidity

The first known use of acidity was in 1615

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More Definitions for acidity


acid·​i·​ty | \ ə-ˈsi-də-tē How to pronounce acidity (audio) \
plural acidities

Kids Definition of acidity

: the quality, state, or degree of being acid


acid·​i·​ty | \ ə-ˈsid-ət-ē, a- How to pronounce acidity (audio) \
plural acidities

Medical Definition of acidity

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

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Comments on acidity

What made you want to look up acidity? Please tell us where you read or heard it (including the quote, if possible).


to spread over or through

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