Pronunciation: (ī'u-nīz"), [key]
—v., -ized, -iz•ing.
1. to separate or change into ions.
2. to produce ions in.
to become changed into the form of ions, as by dissolving. Also, esp. Brit.,i'on•ise".
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.