Meaning of “going” - Learner’s Dictionary

going

noun uk us /ˈɡəʊɪŋ/
DIFFICULTY [ U ]

how easy or difficult something is:

I found the exam quite hard going.
GROUND [ U ]

the condition of the ground for walking, riding, etc

LEAVING [ no plural ]

the fact that someone leaves somewhere:

His going came as a big surprise.

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