acid·i·ty | \ ə-ˈsi-də-tē , 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

The deficiency can also be caused by a low soil acidity and a calcium deficiency in the soil. Tom Maccubbin,, "How to treat blossom-end rot," 9 June 2018 Studying river data nationwide, research published Monday explains that 37 percent of all U.S. river systems have greater salinity, and 90 percent have seen a decrease in acidity, compared with a century ago. Eric Roston,, "First Came the Snow Bomb, Now Comes the Salt Bomb," 8 Jan. 2018 The project aims to discover how ocean acidity levels change seasonally, and where there are hot spots or refuges from corrosive waters. Laine Welch, Anchorage Daily News, "For Alaska sockeye salmon, record highs in Bristol Bay, record lows nearly everywhere else," 9 July 2018 With classic notes of petrol and lime, plus orange zest, lemon, ripe red apple and lively acidity, this wine was racy and refreshing. Michael Austin,, "Explore Michigan's diverse wine scene, one of the country's most exciting developing regions," 5 July 2018 Saba’s torpedo-like instrument is actually an underwater drone, known as a Slocum glider, that is carrying an ocean acidity sensor. Eric Niiler, National Geographic, "The Ocean Is Getting More Acidic—What That Actually Means," 15 June 2018 Some mix Chinese and Western instruments, others write exclusively for Western ensembles; some draw on Chinese folk themes, others favor a bracing post-tonal acidity, and still more are neo-Romantics. Allan Kozinn, WSJ, "Music Across Generations and Cultures," 24 Apr. 2018 While the former lends structure, acidity, and a savory side, the latter is fruit-forward and earthy. Sunset, "5 Tricky Food & Wine Pairings We’ve Mastered," 22 Jan. 2018 The growing conditions contribute to the legendary sweet flavor profile, low acidity and intense red color. Claire Perez,, "Noodles Panini’s meatballs and sauce a family recipe," 9 July 2018

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

28 Aug 2018

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 \
plural acidities

Kids Definition of acidity

: the quality, state, or degree of being acid


acid·i·ty | \ ə-ˈsid-ət-ē, a- \
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 deposit or conceal in a hiding place

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