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
Anna Broughel, Forbes.com, 9 Sep. 2025
At the same time, its broader technology pipeline, spanning sodium-ion chemistries, dual-power pack designs, integrated chassis, and tougher safety credentials, signals the company’s intent to compete across performance, cost, and reliability in one of the world’s most demanding EV markets.
—Kaif Shaikh, Interesting Engineering, 8 Sep. 2025
That's due to polarization, which hampers the movement of lithium ions into the battery's electrodes during rapid charging and discharging.
—Abhimanyu Ghoshal, New Atlas, 6 Sep. 2025
In general, those with lithium-ion or lithium-metal batteries should also be carried on board, where flight crews can recognize and respond to lithium battery fires, according to the FAA.
—Eve Chen, USA Today, 5 Sep. 2025
See All Example Sentences for ion
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Noun
Its Organic SolidFlow technology is designed for long-duration storage, targeting commercial and utility-scale customers who need performance beyond what lithium-ion typically offers.
—Anna Broughel, Forbes.com, 9 Sep. 2025
At the same time, its broader technology pipeline, spanning sodium-ion chemistries, dual-power pack designs, integrated chassis, and tougher safety credentials, signals the company’s intent to compete across performance, cost, and reliability in one of the world’s most demanding EV markets.
—Kaif Shaikh, Interesting Engineering, 8 Sep. 2025
That's due to polarization, which hampers the movement of lithium ions into the battery's electrodes during rapid charging and discharging.
—Abhimanyu Ghoshal, New Atlas, 6 Sep. 2025
In general, those with lithium-ion or lithium-metal batteries should also be carried on board, where flight crews can recognize and respond to lithium battery fires, according to the FAA.
—Eve Chen, USA Today, 5 Sep. 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 16 Sep. 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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