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
ArsTechnica, 1 May 2025
As outlined by the FAA, this also covers dry cell batteries, lithium metal, and lithium ion batteries for consumer electronics, such as AA, AAA, C, and D batteries, coin cell batteries, camera batteries and laptop batteries.
—Moná Thomas, People.com, 1 May 2025
Under Earth’s surface temperature and pressure conditions chemical effects hinder the incorporation of magnesium ions into the crystal structure, favoring the formation of pure calcium carbonate like calcite or aragonite.
—David Bressan, Forbes.com, 8 Apr. 2025
This way, the zwitterionic polymer could bind water tightly enough to prevent it from splitting at higher voltages while still releasing lithium ions when needed.
—ArsTechnica, 14 Apr. 2025
See All Example Sentences for ion
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Noun
Inside each of the mission's four thrusters, an electromagnetic field ionizes the xenon gas before expelling the ions to produce thrust.
—ArsTechnica, 1 May 2025
As outlined by the FAA, this also covers dry cell batteries, lithium metal, and lithium ion batteries for consumer electronics, such as AA, AAA, C, and D batteries, coin cell batteries, camera batteries and laptop batteries.
—Moná Thomas, People.com, 1 May 2025
Under Earth’s surface temperature and pressure conditions chemical effects hinder the incorporation of magnesium ions into the crystal structure, favoring the formation of pure calcium carbonate like calcite or aragonite.
—David Bressan, Forbes.com, 8 Apr. 2025
This way, the zwitterionic polymer could bind water tightly enough to prevent it from splitting at higher voltages while still releasing lithium ions when needed.
—ArsTechnica, 14 Apr. 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 7 May. 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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