1. a person who is concerned about environmental issues
Usage: informal
2. a green-colored marble
Usage: informal
3. a newcomer or inexperienced person
Usage: informal; sometimes derogatory

Examples

• The greenie organized a beach cleanup event.
• She’s such a greenie that she bikes to work every day.
• I lost my favorite greenie in the marble game.
• The kids traded their greenies for cat’s eyes.
• The new employee was just a greenie who needed training.
• Don’t be so hard on him; he’s still a greenie.