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
Kayleigh Drake, Miami Herald, 3 Mar. 2025
What this means for you The authors contend that tea brewing may adsorb heavy metals via heavy metal ions sticking to the surfaces of tea leaves and staying trapped until the bag is disposed.
—Kristen Rogers, CNN, 26 Feb. 2025
One process called excitotoxicity occurs when too many calcium ions are allowed into neurons, activating enzymes that fragment DNA and damage cells, causing death.
—Aaron Priester, The Conversation, 19 Feb. 2025
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
See All Example Sentences for ion
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Noun
And thanks to the negative ion technology, this tool helps reduce frizz and add shine to your hair.
—Kayleigh Drake, Miami Herald, 3 Mar. 2025
What this means for you The authors contend that tea brewing may adsorb heavy metals via heavy metal ions sticking to the surfaces of tea leaves and staying trapped until the bag is disposed.
—Kristen Rogers, CNN, 26 Feb. 2025
One process called excitotoxicity occurs when too many calcium ions are allowed into neurons, activating enzymes that fragment DNA and damage cells, causing death.
—Aaron Priester, The Conversation, 19 Feb. 2025
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
See All Example Sentences for ion
Cite this Entry
“Ion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ion. Accessed 12 Mar. 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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