Definitions:
of the colour between blue and yellow in the spectrum; coloured like grass or emeralds

covered with grass or other vegetation

(of a plant or fruit) young or unripe

(of a person) inexperienced or naive

(of a person or their complexion) pale and sickly-looking

green colour or pigment

a piece of public grassy land, especially in the centre of a village

a member or supporter of an environmentalist group or party

make or become green in colour

make less harmful to the environment