1.  going(n = noun.act) departure, going away, leaving - the act of departing;
is a kind of act, deed, human action, human activity
has particulars: breaking away, farewell, leave, leave-taking, parting, french leave, disappearance, disappearing, withdrawal, sailing, boarding, embarkation, embarkment, exit, despatch, dispatch, shipment, takeoff
Derived form verb go₃

2.  going(n = noun.event) departure, exit, expiration, loss, passing, release - euphemistic expressions for death; "thousands mourned his passing"
is a kind of death, decease, expiry
Derived form verb go₁₇

3.  going(n = noun.act) sledding - advancing toward a goal; "persuading him was easy going"; "the proposal faces tough sledding"
is a kind of accomplishment, achievement
Derived form verb go₁₆

   going(s = adj.all) - in full operation; "a going concern"

1.  The act of moving in any manner; traveling; as, the going is bad. [1913 Webster]

2.  Departure. Milton. [1913 Webster]

3.  Pregnancy; gestation; childbearing. Crew. [1913 Webster]

4.  Course of life; behavior; doings; ways. [1913 Webster]
"His eyes are upon the ways of man, and he seeth all his goings." [1913 Webster]

   That goes; in existence; available for present use or enjoyment; current; obtainable; also, moving; working; in operation; departing; as, he is of the brightest men going; going prices or rate. [Webster 1913 Suppl.]

going, n. & adj.
--n.
1 a the act or process of going. b an instance of this; a departure.
2 a the condition of the ground for walking, riding, etc. b progress affected by this (found the going hard).
--adj.
1 in or into action (set the clock going).
2 existing, available; to be had (there's cold beef going; one of the best fellows going).
3 current, prevalent (the going rate).

Idiom:
get going start steadily talking, working, etc. (can't stop him when he gets going). going away a departure, esp. on a honeymoon. going concern a thriving business. going for one colloq. acting in one's favour (he has got a lot going for him). going on fifteen etc. esp. US approaching one's fifteenth etc. birthday. going on for approaching (a time, an age, etc.) (must be going on for 6 years). going-over
1 colloq. an inspection or overhaul.
2 sl. a thrashing.
3 US colloq. a scolding. goings-on behaviour, esp. morally suspect. going to intending or intended to; about to; likely to (it's going to sink!). heavy going slow or difficult to progress with (found Proust heavy going). to be going on with to start with; for the time being. while the going is good while conditions are favourable.

Etymology:
GO(1): in some senses f. earlier a-going: see A(2)

N  motion, movement, move, going, unrest, stream, flow, flux, run, course, stir, evolution, kinematics, telekinesis, step, rate, pace, tread, stride, gait, port, footfall, cadence, carriage, velocity, angular velocity, clip, progress, locomotion, journey, voyage, transit, restlessness, mobility, movableness, motive power, laws of motion, mobilization, moving, in motion, transitional, motory, motive, shifting, movable, mobile, mercurial, unquiet, restless, nomadic, erratic, under way, on the move, on the wing, on the tramp, on the march, eppur si muove, es bildet ein Talent sich in der Stille, sich ein Charakter in dem Strom der Welt.

coming and going, easy going, get going, going ashore, going away, going on, going strong, going to jerusalem, going under, keep going, know what's going on