ion noun definition, meaning - what is ion noun in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “ion”

See all translations

ion

noun [C] us   /ˈaɪ.ən/ specialized
an atom or small group of atoms that has an electrical charge because it has added or lost one or more electrons
ionic
adjective uk   /aɪˈɒn.ɪk/  us   /-ˈɑː.nɪk/
ionic bonding
Translations of “ion”
in Vietnamese ion…
in Spanish ión, ion…
in Thai ไอออน…
in Malaysian ion…
in Chinese (Traditional) 離子…
in Indonesian ion…
in Chinese (Simplified) 离子…
(Definition of ion noun from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of ion?
Add Cambridge dictionaries to your browser to your website

Definitions of “ion” in other dictionaries

Word of the Day

a game in hand

if a sports team has a game in hand over other teams in a competition, it still has another game to play in which it can gain points

Word of the Day

What’s All The Commotion About? (Words to describe sounds)

by Kate Woodford,
May 20, 2015
​​​ In this post we look at a range of words and phrases that we use to describe noise and the absence of noise. Starting with complete quiet, we sometimes use the noun hush to describe silence: A hush fell over the room as the bride walked in./There was a deathly hush (=complete

Read More 

ancestral health noun

May 25, 2015
diet based on the presumed diet of our Palaeolithic ancestors ‘Ancestral health,’ to use a term popular among Paleo followers, has gone mass.

Read More