a person or thing that hardens.
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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use hardener in a sentence
Guet and guiv demand dhe (u) hardener, az boldly az gues and guilt.A Minniature ov Inglish Orthoggraphy | James Elphinston
A recent rival of tungsten both as a filament for lamps and hardener for steel is molybdenum.Creative Chemistry | Edwin E. Slosson
They are so cruel, without even knowing that they are so: the habit of seeing sin and suffering is such a heart-hardener.Records of Later Life | Frances Ann Kemble
She was a harmful woman, a destroyer of young tempers, a hardener of young hearts.Stage Confidences | Clara Morris
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 Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012