1. plural of blackening; instances or processes of making something black or darker in color
2. plural of blackening; a dark substance or coating applied to a surface, especially cast iron or steel, to prevent rust or for aesthetic purposes
Usage: technical
3. plural of blackening; the act of damaging someone's reputation or character
Usage: figurative

Examples

• The blackenings on the cast iron skillet gave it a protective layer.
• Repeated blackenings of the metal surface required careful application of the chemical treatment.
• The politician's opponents engaged in blackenings of his record during the campaign.
• The blackenings caused by the fire damage were extensive throughout the building.
• Traditional blackenings of steel tools help preserve them for decades.