- The definition of lye is an alkaline solution that is often a mix of potassium or hydroxide or sodium which is generally used for cleaning.
A strongly alkaline solution used to make soap is an example oflye.
lye definition by Webster's New World
- Obsolete a strong, alkaline solution obtained by leaching wood ashes
- any strongly alkaline substance, usually sodium or potassium hydroxide, used in cleaning, making soap, etc.
- any substance obtained by leaching
Origin: Middle English lie ; from Old English leag, akin to German lauge ; from Indo-European base an unverified form lou-, to lave
lye definition by American Heritage Dictionary
Origin: Middle English lie, from Old English lēag; see leu(ə)- in Indo-European roots.
lye - Science Definition