1. the process of becoming green or making something green
2. the process of making something more environmentally friendly
3. a type of apple that is green when ripe

1. present participle of green: becoming green or making something green

Examples

• The greening of the trees signals the arrival of spring.
• The city’s greening initiative includes planting more trees in urban areas.
• Corporate greening efforts focus on reducing carbon emissions.
• She picked a fresh greening apple from the orchard.
• The lawn is greening up after the recent rain.
• Environmental groups support the greening of public transportation.
• The greening process takes several weeks in early spring.