a substance mixed with paint or other protective covering to make the finish harder or more durable.
Photography. a chemical used to raise the melting point of an emulsion.
Origin of hardener
First recorded in 1605–15; harden
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for hardener
Historical Examples of hardener
She was a harmful woman, a destroyer of young tempers, a hardener of young hearts.
Guet and guiv demand dhe (u) hardener, az boldly az gues and guilt.
A recent rival of tungsten both as a filament for lamps and hardener for steel is molybdenum.
British Dictionary definitions for hardener
a person or thing that hardens
a substance added to paint or varnish to increase durability
an ingredient of certain adhesives and synthetic resins that accelerates or promotes setting
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for hardener
Online Etymology Dictionary, © 2010 Douglas Harper