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
It moves on to the high-energy heartbreak of “Love Letters,” featuring Matt Skiba of Alkaline Trio.
From Los Angeles Times • Oct. 13, 2025
Alkaline materials such as limestone or olivine could be ground up or dissolved in water and then poured into the ocean from a ship.
From Science Magazine • Nov. 30, 2023
DeLonge was replaced in blink-182 for two albums and multiple tours by Alkaline Trio guitarist/vocalist Matt Skiba.
From Seattle Times • Oct. 23, 2023
Alkaline salts, and other diuretics failing of their effects, I ordered him to take an infus. of Digitalis.
From An Account of the Foxglove and some of its Medical Uses With Practical Remarks on Dropsy and Other Diseases by Withering, William
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.
