- any admixture to a substance for promoting or increasing its softness, smoothness, or plasticity.
- water softener.
Examples from the Web for softener
On light-weight goods the softener giving the most general satisfaction is paraffin.
You will note that this softener also contains a percentage of grime which lodges in the pores.The Trap|Betsy Curtis
Yet the only softener of this man of noble granite was a spirit-like girl, who regarded the love of her womanhood as sin.The Story of Tonty|Mary Hartwell Catherwood
But distance is a great mellower of colors and softener of fears.The Bravo|J. Fenimore Cooper
For a softener on heavy weight goods nothing has been found superior to good beef tallow.
British Dictionary definitions for softener
Word Origin and History for softener
c.1600, agent noun from soften.