Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “ionize”


verb [I or T] specialized (UK usually ionise)     /ˈaɪ.ə.naɪz/
to ( cause to) form an ion Physical and chemical processes ionized (UK usually ionised)     /-naɪzd/ adjective Nebulae contain very large amounts of ionized gas .Atoms, molecules and sub-atomic particles ionization (UK usually ionisation)     /ˌaɪ.ə.naɪˈzeɪ.ʃən/ noun [U] Widespread ionization occurs readily in the Earth's upper atmosphere .Physical and chemical processes
(Definition of ionize verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of ionize

Translations of “ionize”

Word of the Day


a good knowledge of something, or the fact that you know it so well

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More