Main Entry: de·ion·ize Variant: or Britishde·ion·ise/(')dE-'I-&-"nIz/ Function: transitive verb Inflected Forms:-izedor British-ised; -iz·ingor British-is·ing : to remove ions from <deionize water by ion exchange> —de·ion·iza·tion/(")dE-"I-&-n&-'zA-sh&n/noun —de·ion·iz·er/(')dE-'I-&-"nI-z&r/noun