adjective
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Capable of neutralizing an acid. Bases are alkaline.
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Relating to an alkali compound.
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Having a pH greater than 7.
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Having a relatively low concentration of hydrogen ions.
Etymology
Origin of alkaline
Vocabulary lists containing alkaline
Chemistry - High School
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Chemistry - Middle School
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
It has been estimated that a typical cremation has a footprint equivalent to about 320kg of carbon dioxide- Alkaline hydrolysis is found to result in the emission of seven times less CO2.
From BBC • Mar. 2, 2026
Alkaline water, for instance, has a higher-than-average pH value that makes it less acidic, but to prevent dehydration, medical professionals say that the amount of water you drink—not pH levels—is more hydrating.
From National Geographic • Sep. 14, 2023
Despite DeLonge’s time away, when he was replaced by the Alkaline Trio’s Matt Skiba, the locked-in power trio seemed to have their good-old-days chemistry intact.
From Seattle Times • Jun. 26, 2023
Alkaline minerals in the rocks convert dissolved carbon dioxide into long-lasting carbonate and bicarbonate ions, allowing the ocean to absorb more atmospheric carbon dioxide.
From Science Magazine • Jun. 14, 2023
Alkaline solutions of permanganate convert the cellulose into oxycellulose, which resembles the oxycellulose obtained by the action of the nitric acid.
From The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student by Beech, Franklin
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
