Definition of "deionize" [de•i•on•ize]

• To remove ions from (a solution) using an ion-exchange process. (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "And the people from the future who used these remarkable instruments - these digital watches with eight buttons and foot massagers and abdominal exercisers - they were all tall and sleek and slender and so clearly happy to be living in the future where your watch could also tell you the temperature and deionize the air."