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
Miami Herald, 20 Mar. 2026
With the growing demand for advanced Li-ion batteries, silicon has emerged as a promising alternative to traditional graphite anodes due of its higher theoretical capacity.
—Georgina Jedikovska, Interesting Engineering, 18 Mar. 2026
One particularly abundant ion present was the trihydrogen cation (H3+) and the ion density was, on average, three times greater than the rest of the aurora.
—Keith Cooper, Space.com, 10 Mar. 2026
The company is deepening and widening its local supplier partnerships to make components including lithium-ion cells, watch and phone enclosures and accessories such as AirPods.
—Bloomberg, Mercury News, 10 Mar. 2026
See All Example Sentences for ion
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Noun
The Dolphins traded star receiver Jaylen Waddle to the Denver Broncos ion Tuesday in exchange for a first-round pick, a third-round pick and a fourth-round pick swap.
—Miami Herald, 20 Mar. 2026
With the growing demand for advanced Li-ion batteries, silicon has emerged as a promising alternative to traditional graphite anodes due of its higher theoretical capacity.
—Georgina Jedikovska, Interesting Engineering, 18 Mar. 2026
One particularly abundant ion present was the trihydrogen cation (H3+) and the ion density was, on average, three times greater than the rest of the aurora.
—Keith Cooper, Space.com, 10 Mar. 2026
The company is deepening and widening its local supplier partnerships to make components including lithium-ion cells, watch and phone enclosures and accessories such as AirPods.
—Bloomberg, Mercury News, 10 Mar. 2026
See All Example Sentences for ion
Cite this Entry
“Ion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ion. Accessed 23 Mar. 2026.
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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