1. removes ions from (a substance, typically water) using a deionizer or ion-exchange process
Usage: chiefly British spelling; American English typically uses 'deionizes'; technical/scientific term

Examples

• The laboratory deionises water for use in sensitive chemical experiments.
• This filter deionises tap water to remove dissolved minerals.
• The system deionises the solution before analysis.
• Hard water is deionised to prevent equipment damage.
• The process deionises the liquid by passing it through ion-exchange resin.