1
: an atom or group of atoms that carries a positive or negative electric charge as a result of having lost or gained one or more electrons
2
: a charged subatomic particle (such as a free electron)
Ionic
1
a
: act or process
validation
b
: result of an act or process
regulation
2
: state or condition
hydration
Examples of ion in a Sentence
Recent Examples on the Web
IEEE Spectrum, 11 Feb. 2025
New Delhi in its union budget earlier this month reduced tariffs on a range of products including motorcycles, electronic goods, critical minerals and lithium ion batteries.
—Anniek Bao, CNBC, 11 Feb. 2025
While you may have been taught to pre-rinse your dishes, this can actually damage them if the detergent ends up removing metal ions rather than grime.
—Heather Bien, Southern Living, 5 Feb. 2025
Scientists at San José State University recorded a dramatic increase in nickel, manganese and cobalt — materials used in lithium ion batteries — in soil samples at the Elkhorn Slough Reserve after the recent fire at the nearby Moss Landing Power Plant.
—Clara Harter, Los Angeles Times, 29 Jan. 2025
See All Example Sentences for ion
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Noun
The acid solution is passed through an ion exchanger, which is a column lined with a resin to which the element of interest (rubidium, in this case) will stick.
—IEEE Spectrum, 11 Feb. 2025
New Delhi in its union budget earlier this month reduced tariffs on a range of products including motorcycles, electronic goods, critical minerals and lithium ion batteries.
—Anniek Bao, CNBC, 11 Feb. 2025
While you may have been taught to pre-rinse your dishes, this can actually damage them if the detergent ends up removing metal ions rather than grime.
—Heather Bien, Southern Living, 5 Feb. 2025
Scientists at San José State University recorded a dramatic increase in nickel, manganese and cobalt — materials used in lithium ion batteries — in soil samples at the Elkhorn Slough Reserve after the recent fire at the nearby Moss Landing Power Plant.
—Clara Harter, Los Angeles Times, 29 Jan. 2025
See All Example Sentences for ion
Cite this Entry
“Ion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ion. Accessed 27 Feb. 2025.
Copy CitationKids Definition
ion
1 of 2 noun
ˈī-ən 
ˈī-ˌän
: an atom or group of atoms that carries a positive or negative electric charge as a result of having lost or gained one or more electrons
-ion
2 of 2 noun suffix1
a
: act or process
validation
b
: result of an act or process
regulation
2
: state or condition
hydration
Etymology
Noun suffix
derived from Latin -ion (suffix) "act or process"
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