Definition of "blackening"

present participle and gerund of blacken  examples

(uncountable) The act or process of turning (becoming) black in colour.  examples

(countable) The result or an instance of such an act or process; a black stain or mark.  examples

Any of various (dark-colored) surface treatments for metal substrates, to inhibit corrosion; on steel, generally, synonym of bluing.  examples

The act of defaming or sullying.  examples