- The definition of water-soluble is can be dissolved in water.
An example of a water-soluble substance is salt.
water-soluble definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
that can be dissolved in water
water-soluble definition by American Heritage Dictionary
Soluble in water.