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
Shi En Kim, Smithsonian Magazine, 5 Nov. 2024
Fast lithium ion transfer is ensured by a fast ion conductor coating on the cathode, fast-charging graphite and novel nano-coating technologies for the anode, multi-gradient layered electrode design, and ultra-high conductivity electrolyte formulation.
—New Atlas, 24 Oct. 2024
The 2024 general elect ion will take place Tuesday, Nov. 5.
—Katie Wiseman, The Indianapolis Star, 8 Oct. 2024
All matter—wands, balloons, webs, air—strives for balance between its positive and negative particles (protons, electrons and ions).
—Max G. Levy, WIRED, 27 Oct. 2024
See all Example Sentences for ion 
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Noun
The mobile ions here are responsible for drumming up Neptune’s magnetic shield.
—Shi En Kim, Smithsonian Magazine, 5 Nov. 2024
Fast lithium ion transfer is ensured by a fast ion conductor coating on the cathode, fast-charging graphite and novel nano-coating technologies for the anode, multi-gradient layered electrode design, and ultra-high conductivity electrolyte formulation.
—New Atlas, 24 Oct. 2024
The 2024 general elect ion will take place Tuesday, Nov. 5.
—Katie Wiseman, The Indianapolis Star, 8 Oct. 2024
All matter—wands, balloons, webs, air—strives for balance between its positive and negative particles (protons, electrons and ions).
—Max G. Levy, WIRED, 27 Oct. 2024
See all Example Sentences for ion
Dictionary Entries Near ion
Cite this Entry
“Ion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ion. Accessed 25 Nov. 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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