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
Aamir Khollam, Interesting Engineering, 8 Dec. 2025
Potassium-ion batteries are considered an alternative to lithium-ion batteries.
—Jenna Prestininzi, Freep.com, 8 Dec. 2025
Electronics Leaving your cellphone or tablet in the car during freezing temperatures can cause several issues, including damage to the lithium ion batteries inside, which are highly sensitive to extreme cold, USA TODAY reports.
—Marina Johnson, Louisville Courier Journal, 5 Dec. 2025
Your batteries might be to blame – and the solution might be an alternative to conventional lithium-ion cells.
—Abhimanyu Ghoshal, New Atlas, 3 Dec. 2025
See All Example Sentences for ion
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Noun
Dong said more research is needed to control doping levels across different particle sizes and to study how manganese ions behave within the structure.
—Aamir Khollam, Interesting Engineering, 8 Dec. 2025
Potassium-ion batteries are considered an alternative to lithium-ion batteries.
—Jenna Prestininzi, Freep.com, 8 Dec. 2025
Electronics Leaving your cellphone or tablet in the car during freezing temperatures can cause several issues, including damage to the lithium ion batteries inside, which are highly sensitive to extreme cold, USA TODAY reports.
—Marina Johnson, Louisville Courier Journal, 5 Dec. 2025
Your batteries might be to blame – and the solution might be an alternative to conventional lithium-ion cells.
—Abhimanyu Ghoshal, New Atlas, 3 Dec. 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 Dec. 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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