Meaning of “green” - Learner’s Dictionary

green

noun uk us /ɡriːn/
COLOUR [ C, U ]

A2 the colour of grass

GOLF [ C ]

a special area of very short, smooth grass on a golf course:

the 18th green
VILLAGE [ C ]

an area of grass in the middle of a village

(Definition of “green noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)