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
Bloomberg, The Mercury News, 5 June 2024
The researchers estimate that only about 2 percent of the wafer underwent reactions during the etching process (largely forming aluminate ions).
—John Timmer, Ars Technica, 4 June 2024
Because lithium ion batteries come with a risk of fires that can be extinguished only with special chemicals, the ship will be inspected after each docking.
—Cameron Pugh, The Christian Science Monitor, 3 June 2024
One of these might, say, represent all the molecular-scale ions, ion channels and so forth that produce currents in our neurons; another represents the firing patterns of the neurons themselves; another, the activity seen in compartments of the brain such as the hippocampus and frontal cortex.
—Quanta Magazine, 10 June 2024
See all Example Sentences for ion 
Noun
But on extremely hot days, the ions in an EV battery whizz around even when the car isn’t driving or plugged in, and that can curtail range irreversibly.
—Bloomberg, The Mercury News, 5 June 2024
The researchers estimate that only about 2 percent of the wafer underwent reactions during the etching process (largely forming aluminate ions).
—John Timmer, Ars Technica, 4 June 2024
Because lithium ion batteries come with a risk of fires that can be extinguished only with special chemicals, the ship will be inspected after each docking.
—Cameron Pugh, The Christian Science Monitor, 3 June 2024
One of these might, say, represent all the molecular-scale ions, ion channels and so forth that produce currents in our neurons; another represents the firing patterns of the neurons themselves; another, the activity seen in compartments of the brain such as the hippocampus and frontal cortex.
—Quanta Magazine, 10 June 2024
See all Example Sentences for ion
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'ion.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near ion
Cite this Entry
“Ion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ion. Accessed 15 Jul. 2024.
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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