softenersoft‧en‧er /ˈsɒfənə $ ˈsɒːfənər/ noun [uncountable and countable] Word Family: noun: softness, softener, SOFTIE/SOFTY; verb: soften; adverb: softly; adjective: softa substance that you add to water to make clothes feel soft after washing: fabric softener⇨ water softener