ion
noun
\ ˈī-ən
, ˈī-ˌän\
, ˈī-ˌän\
Definition of ion
(Entry 1 of 3)
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
abbreviationDefinition of Ion (Entry 2 of 3)
Ionic
-ion
noun suffixDefinition of -ion (Entry 3 of 3)
1a
: 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
Europe is expected to increase its lithium-ion capacity from 18 GWh today—enough to make 300,000 fully electric vehicles (EVs)—to 198 GWh in the next four years. — Akshat Rathi, Quartz, "Europe is beating the US in the battery race—with China’s help," 31 July 2019 The Leaf now packs 62kWh of lithium-ion between its axles, and there's now a more powerful 160kW (214hp), 339Nm (250lb-ft) AC synchronous electric motor under the hood. — Jonathan M. Gitlin, Ars Technica, "Nissan’s bigger-battery BEV—the 2019 Leaf Plus review," 30 July 2019 Lithium-ion advantages Let’s compare this to George, who lives in a lithium-ion battery. — Robert Masse, The Conversation, "How do lithium-ion batteries work?," 15 July 2019 Nearly all of the utility-scale batteries now on the grid or in development are massive versions the same lithium ion technology that powers cellphones and laptops. — Washington Post, "Arizona fire highlights challenges for energy storage," 23 June 2019 What's more interesting is that, as company founder Sir James Dyson told Autocar, lightweight, energy-dense solid-state battery technology is being considered and could replace the lithium-ion type currently used in most electric vehicles. — Drew Dorian, Car and Driver, "Dyson's Long-Awaited Electric Vehicle Revealed in Design Patent Filing," 9 May 2019 The most commonly used batteries, lithium-ion, store energy in solid materials, like various metals. — Angela Chen, The Verge, "How a ‘solar battery’ could bring electricity to rural areas," 27 Sep. 2018 The silver ions found in this wash have some serious antiseptic powers. — Megan Mcintyre, Glamour, "This Face Wash Is the Only Thing That Helped My Acne," 29 Aug. 2018 The car’s lithium-ion high-voltage battery ignited twice more after the initial fire, as the Model S sedan was being loaded onto a tow truck and again at a storage yard, the NTSB said. — Victoria Ballard, Sun-Sentinel.com, "Tesla's new speed control feature dedicated to Fort Lauderdale teen," 1 July 2018These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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More Definitions for ion
ion
noun
English Language Learners Definition of ion
(Entry 1 of 2)
technical
: an atom or group of atoms that has a positive or negative electric charge from losing or gaining one or more electrons
-ion
noun suffixEnglish Language Learners Definition of -ion (Entry 2 of 2)
: act or process
: result of an act or process
: state or condition
See the full definition for -ion in the English Language Learners Dictionary
ion
noun
\ ˈī-ən
, ˈī-ˌän\
, ˈī-ˌän\
Kids Definition of ion
: an atom or group of atoms that carries an electric charge
-ion
noun suffixKids Definition of -ion
1
: act or process
construction
2
: result of an act or process
regulation eruption
3
: state or condition
perfection
ion
noun
\ ˈī-ən
, ˈī-ˌän
\
, ˈī-ˌän
\
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