Definition of ion
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)
Recent Examples of ion from the Web
Minnesota Public Radio produces this science podcast for kids, which touches on everything from the ions in slime to how elevators work.
The 787 Dreamliner, with its composite-fibre chassis, lithium-ion batteries, and super-efficient engines, can fairly claim to be the coolest airplane in the world.
The settlement comes after a class action lawsuit on behalf of people who purchased products containing lithium-ion cylindrical batteries.
China already makes up 55% of global lithium-ion battery production according to Bloomberg, and by 2021 they are expected to hold 65% of all production.
Electric energy and power for the while system are delivered by a surprisingly compact and lightweight 1.56 kWh lithium ion polymer battery that is located underneath the rear seat.
The ions are then shot out the back of the rocket, pushing the spacecraft forward.
The lithium-ion polymer battery lives under the back seat.
The cost of lithium ion batteries, the gold standard in solar power storage, has fallen significantly, Mr. Turner said, largely because of economies of scale.
These 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.
Definition of Ion
Definition of -ion
1a : act or process validationb : result of an act or process regulation
2 : state or condition hydration
Origin and Etymology of -ion
French -ion, from Latin -ion-, -io
ION Defined for English Language Learners
Definition of ion for English Language Learners
: an atom or group of atoms that has a positive or negative electric charge from losing or gaining one or more electrons
Definition of -ion for English Language Learners
: act or process
: result of an act or process
: state or condition
ION Defined for Kids
Definition of ion for Students
: an atom or group of atoms that carries an electric charge
Definition of -ion for Students
1 : act or process construction
2 : result of an act or process regulation eruption
3 : state or condition perfection
Seen and Heard
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