Meaning of green in English
1. having the color of grass and leaves; greenish
green leaves
She is still green at [new to, inexperienced in] the work.
3. relating to the protection of the environment; environment-friendly
green activity
4. having little or no experience; inexperience
She is still inexperienced[new to, green at] in the work.
1. the color of grass or leaves
Green means 'Go.'
The green light is the "go" signal.