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
Georgina Jedikovska, Interesting Engineering, 2 June 2026
The silicon also forms a soluble ion, (NH4)2SiF6), while the aluminum forms a similar ion that remains behind as a solid, (NH4)3AlF6).
—ArsTechnica, 28 May 2026
Ion exchange swaps nitrate ions for harmless ones like chloride.
—Ryan Brennan
may 27, Miami Herald, 27 May 2026
Instead of using extreme heat to produce clinker, electrical energy drives ion transport and chemical reactions within the reactor, assembling the precursor material, eCSH, under significantly milder conditions, before a subsequent heating stage converts it into belite-rich clinker.
—New Atlas, 26 May 2026
See All Example Sentences for ion
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Noun
These include sodium-ion and lithium-iron-phosphate (LFP).
—Georgina Jedikovska, Interesting Engineering, 2 June 2026
The silicon also forms a soluble ion, (NH4)2SiF6), while the aluminum forms a similar ion that remains behind as a solid, (NH4)3AlF6).
—ArsTechnica, 28 May 2026
Ion exchange swaps nitrate ions for harmless ones like chloride.
—Ryan Brennan
may 27, Miami Herald, 27 May 2026
Instead of using extreme heat to produce clinker, electrical energy drives ion transport and chemical reactions within the reactor, assembling the precursor material, eCSH, under significantly milder conditions, before a subsequent heating stage converts it into belite-rich clinker.
—New Atlas, 26 May 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 5 Jun. 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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