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
Philip Ball, Quanta Magazine, 25 Mar. 2024
Fill the clock with water, and two metal plates inside use the positive and negative ions in the liquid to generate enough electricity to keep the clock ticking.
—Karen Sullivan -, Charlotte Observer, 31 Jan. 2024
See all Example Sentences for ion 
Noun
Jamming a lot of them into the same small space gets harder the more ions there are.
—Philip Ball, Quanta Magazine, 25 Mar. 2024
Fill the clock with water, and two metal plates inside use the positive and negative ions in the liquid to generate enough electricity to keep the clock ticking.
—Karen Sullivan -, Charlotte Observer, 31 Jan. 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 6 May. 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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