1) Apple 2) Rejuvenation 1) Color 2) Colour 3) Discolor 4) Discolour 5) Eco-friendly procedure 6) English surname 
Greening is the process of transforming artifacts such as a space, a lifestyle or a brand image into a more environmentally friendly version (i.e. `greening your home` or `greening your office`). The act of greening involves incorporating `green` products and processes into one`s environment, such as the home, work place, and general lifest...
• (p. pr. & vb. n.) of Green • (n.) A greenish apple, of several varieties, among which the Rhode Island greening is the best known for its fine-grained acid flesh and its excellent keeping quality.
Meaning as a surname: Son of `Grening` an old personal name
Green'ing noun A greenish apple, of several varieties, among which the Rhode Island greening is the best known for its fine-grained acid flesh and its excellent keeping quality. 
Greening is the term used to cover the introduction of measures that enhance the overall environmental performance of Pillar 1 of the CAP.
[adj] - turning green
adjective turning green; leafing out; `overgrown with greening trees and underbrush`