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)

Ion

2 of 3

abbreviation

Ionic

-ion

3 of 3

noun suffix

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
Noun
Plus, the lithium ion battery inside enables this option to go twelve months without being recharged if unused. Jack Byram, Better Homes & Gardens, 31 Mar. 2024 This slowdown can prevent the lithium ions from properly inserting into the electrodes. Wesley Chang, CBS News, 5 Mar. 2024 This structure offers 15 different pathways for lithium ions to navigate through the material. IEEE Spectrum, 15 Feb. 2024 This power comes from the way salt dissolves in water and breaks down into ions: in the case of simple rock salt, which is a rawer, less pure version of table salt, each molecule splits into one ion each of sodium and chloride. Meghan Bartels, Scientific American, 16 Jan. 2024 Fluidic memristors could similarly manipulate several ion types in order to broaden a circuit’s electronic capabilities. IEEE Spectrum, 29 Mar. 2024 Researchers have created ion traps by suspending the ions in a tiny vacuum cavity at ultralow temperatures (to avoid thermal jiggling) while laser beams switch them between different energy states to manipulate the information. Philip Ball, Quanta Magazine, 25 Mar. 2024 In June, Corre announced a deal in Germany to provide up to 640 megawatts of electricity, enough to supply about 1.6 million German homes, for up to 125 hours, at about one-tenth the cost of lithium-ion. Amos Zeeberg, New York Times, 18 Mar. 2024 Sijo even treats its fabrics with a silver ion for extra protection against bacteria. Marilyn La Jeunesse, Southern Living, 14 Mar. 2024

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.

Word History

Etymology

Noun

Greek, neuter of iōn, present participle of ienai to go — more at issue entry 1

Noun suffix

French -ion, from Latin -ion-, -io

First Known Use

Noun

circa 1834, in the meaning defined at sense 1

Time Traveler
The first known use of ion was circa 1834

Dictionary Entries Near ion

Cite this Entry

“Ion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ion. Accessed 19 Apr. 2024.

Kids Definition

ion

1 of 2 noun
ˈī-ən How to pronounce ion (audio)
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 suffix
1
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"

Medical Definition

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 see anion, cation
2
: a charged subatomic particle (as a free electron)

More from Merriam-Webster on ion

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