ion Meaning in the Cambridge English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Meaning of “ion” in the English Dictionary

"ion" in British English

See all translations

ionnoun [C]

us   /ˈaɪ.ən/ specialized
an ​atom or ​smallgroup of ​atoms that has an ​electricalcharge because it has ​added or ​lost one or more electrons
adjective uk   /aɪˈɒn.ɪk/  us   /-ˈɑː.nɪk/
ionic ​bonding


uk   us   /-ən/ (also -ation, also -ition)
added to ​verbs to ​formnounsshowingaction or ​condition: obsession restoration repetition
(Definition of ion from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"ion" in American English

See all translations

ionnoun [C]

 us   /ˈɑɪˌɑn, -ən/
physics, chemistry an ​atom that has a ​positive or ​negativeelectrical charge as the ​result of ​adding or taking away an electron
(Definition of ion from the Cambridge Academic Content Dictionary © Cambridge University Press)
Translations of “ion”
in Spanish ión, ion…
in Vietnamese ion…
in Malaysian ion…
in Thai ไอออน…
in Chinese (Simplified) 离子…
in Indonesian ion…
in Chinese (Traditional) 離子…
What is the pronunciation of ion?
Add Cambridge dictionaries to your browser to your website
Word of the Day


made of gold

Word of the Day

Introducing a new author and a new weekly blog post!
Introducing a new author and a new weekly blog post!
by Cambridge Dictionaries Online,
August 27, 2015
The English language is constantly changing. You know that. But did you know that at Cambridge Dictionaries Online we keep track of the changes? We continually add new words and new meanings to our online dictionary for learners of English. Some of them are new to English entirely (neologisms), and some

Read More 

parklet noun
parklet noun
August 31, 2015
a public outdoor space that may be associated with a local business but where anyone can sit Pop-up cafes in NY are what’s actually called parklets in many other places around the country.

Read More