1. superlative form of green; having the most green color
2. superlative form of green; most environmentally friendly or sustainable
Usage: modern usage
3. superlative form of green; most inexperienced or naive
Usage: informal

Examples

• The greenest part of the forest is near the river.
• This company has the greenest practices in the industry.
• He was the greenest member of the team when he started.
• The greenest vegetables are often the most nutritious.
• Their greenest initiative reduced carbon emissions by 40 percent.
• The greenest recruits needed the most training.