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
Paul Sutter, Space.com, 23 Sep. 2025
Rather than treating it as waste, Aepnus feeds it into a modular electrolyzer that, when powered, drives electrochemical reactions to split and rearrange the ions into the original reagents – caustic soda and sulfuric acid.
—Kapil Kajal, Interesting Engineering, 23 Sep. 2025
In the photo is a portion of an optics table and a superconducting magnet that traps Beryllium ions.
—Sunya Bhutta, Scientific American, 22 Sep. 2025
The thicker the membrane, the longer this memory lasts; in some cases up to about 140 seconds, far beyond what simple ion movement would predict.
—New Atlas, 30 Aug. 2025
See All Example Sentences for ion
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Noun
An ion implanter paints microscopic transistors to create circuits.
—Paul Sutter, Space.com, 23 Sep. 2025
Rather than treating it as waste, Aepnus feeds it into a modular electrolyzer that, when powered, drives electrochemical reactions to split and rearrange the ions into the original reagents – caustic soda and sulfuric acid.
—Kapil Kajal, Interesting Engineering, 23 Sep. 2025
In the photo is a portion of an optics table and a superconducting magnet that traps Beryllium ions.
—Sunya Bhutta, Scientific American, 22 Sep. 2025
The thicker the membrane, the longer this memory lasts; in some cases up to about 140 seconds, far beyond what simple ion movement would predict.
—New Atlas, 30 Aug. 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 24 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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